Why Can’t I Stop Thinking About Him? Post-Breakup Obsessive Thinking

Going through a breakup can make you feel confused, distressed, angry, sad, and more, and the mix of emotions can feel destabilizing. Especially if the relationship ended suddenly or by their choice instead of yours, you might find yourself having repetitive thoughts about the situation or about your ex. While these thoughts can be normal at first, they may become disruptive and distressing the longer they go on. Below is an overview of common reasons you can’t stop thinking about your ex-boyfriend, strategies for moving on, and how working with an online therapist can help you progress toward healing.

Why you can’t stop thinking about him

In general, thinking about your ex-boyfriend and your past relationship a lot may not be a bad thing. It can be normal and part of the process after a breakup. This may be especially true if he was the one who ended it, as you may find yourself going over every interaction in your head to try to make sense of things and cope with unresolved feelings.

Losing the routines you formed with your ex can also lead you to think about him often. For example, if you always had your morning coffee together or you always drink your morning coffee from a mug he gave you, you’ll have a daily reminder of what has changed. Regular reminders like these can keep your ex-partner top of mind. 

A breakup can also be considered a major life change. Whether you dated for six months or several years, you likely formed an attachment with this person. In many cases, those emotional bonds don’t disappear overnight. 

Finally, a breakup may also affect your sense of identity and future plans. It can feel strange to be single and viewed as “the ex” rather than someone who is part of your former boyfriend’s daily life and future. This experience can lead your mind to keep coming back to a time when you felt stable in who you were as this person’s partner.

How your attachment style could affect your thought patterns

In some cases, other psychological factors may keep your ex on your mind. One example is having an anxious attachment style, which is linked to a fear of abandonment. Being broken up with can trigger this fear, which may make your mind fixate on the thought pattern of wanting to regain companionship and support.

How contact and reminders make it harder to move on

If you and your ex are still texting, having phone calls, or seeing each other in real life at work or school, his continued presence in your life may be providing intermittent reinforcement of your feelings of longing. Checking his social media, even if you’re not directly communicating, can have the same effect. These reminders can strengthen repetitive thoughts about him and make it harder to move on.

When thoughts turn into obsession

Rumination is “obsessional thinking involving excessive, repetitive thoughts or themes that interfere with other forms of mental activity.” Ruminating about your ex-boyfriend means having repetitive thoughts about him that can be hard to control. 

When these obsessive cognitive patterns start causing distress and/or interfering with sleep, focus, and daily functioning, it may be time to seek the support of a therapist to address them. These thoughts may be a sign of grief or stress, or they might indicate a condition like anxiety, depression, or obsessive-compulsive disorder. Whatever the case may be, a therapist can often help you find relief.

Other ways breakups can affect mental health

In addition to causing frequent or obsessive thoughts about your ex that may cause distress, a breakup can also affect your mental health in other ways. For example, it may:

• Increase negative feelings
• Decrease self-esteem
• Negatively impact your sleep
• Cause feelings of loneliness
• Cause or exacerbate symptoms of depression
• Cause or exacerbate symptoms of anxiety

If you’re struggling to cope with the after-effects of a breakup, reaching out for professional support can be crucial—especially if you have underlying mental health conditions or are experiencing new symptoms. An online therapist can help you navigate your feelings and develop healthy ways to cope. 

Strategies to stop thinking about him

If you want to stop thinking about your ex-boyfriend so much, remember that this process usually takes time. Some effective strategies that may help you on this journey include:

• Redirecting your attention. Use mindfulness to notice the thought, name it, and then consciously distract yourself in a healthy way—either to a more encouraging thought or a positive physical task. 
• Being aware of what triggers these thoughts. For example, if you find the obsessive thoughts bubbling up after you’ve been looking through your old photos together, limiting this behavior might help. Or, if driving by his neighborhood on your way to work brings up these thoughts, consider taking a different route for a while.
• Focusing on other relationships. Spending too much time alone after a breakup can increase obsessive thinking. Instead, you might dedicate more time to other relationships, such as by connecting with a close friend or meeting new people.
• Setting boundaries while you heal. Removing physical reminders of your ex (like photos of you together) from your space and unfollowing him on social media are examples of post-breakup boundaries that could help you heal. 

Finding closure without answers

People often talk about the desire to find closure after a breakup so they can move on, and it’s common to want this closure to come from your ex. For example, you might want them to give you an apology or a clear and compelling explanation for why they ended the relationship. Or, you might dream of having a detailed conversation with them about the roles you each played in a particular conflict.

Remember, however, that even the most exhaustive explanation from your ex usually won’t be enough to give you the satisfying feeling of closure that you crave. Closure is something you have to create for yourself, usually gradually over time. It can involve:

• Acknowledging the hurt

• Facing and processing your emotions around the relationship and its end

• Letting go of the unanswered questions or “what-ifs”

• Working toward a sense of acceptance

Self-care after a breakup

Taking good care of yourself physically and mentally may also help you curb obsessive thoughts about your ex and work toward healing. That’s why self-care is often key after a breakup. Physical self-care can involve habits like making sure you’re eating nutrient-dense meals often, getting enough sleep, and exercising regularly. Mental and emotional self-care can involve practices like journaling, meditating, limiting social media use, spending time in nature, and spending time with friends.

When you start thinking about a new relationship

If you decide one day that you’d like to re-enter the dating world and exchange phone numbers or meet up with someone new, it can help to check in with yourself and make sure you feel emotionally ready. Whether you want to date casually or for a committed relationship, you might ask yourself: 

• Have I taken enough time to heal? 
• Am I entering the dating scene for the right reasons? 
• Am I ready to open myself up emotionally to someone new? 
• Am I ready to apply what I learned from my last relationship to avoid the same patterns in my new relationship? 

Being honest with yourself about where you're at emotionally may help you avoid unhealthy patterns.

Getting support from others in the healing process

Having a strong social support system may also help you stop thinking about your ex and recover from your breakup. For example, friends and family can offer a listening ear or distract you from repetitive thoughts, and expanding your social life by meeting new people can help you redirect your energy in a positive new way. Also, joining a formal or informal support group for breakups or grief could give you an outlet and a way to get support from people who understand.

Getting professional support from a therapist

Many people also benefit from working with a licensed therapist during the healing process. A therapist can provide a safe space for you to express and process complex feelings about your breakup without fear of judgment. 

If you’re struggling with rumination and obsessive thoughts about your ex, a therapist can teach you effective strategies for coping with them. They might use cognitive behavioral therapy (CBT) techniques to help you recognize and shift distorted thoughts or dialectical behavioral therapy (DBT) techniques to help you learn mindfulness and tolerance of strong emotions. If you’re showing signs of a diagnosable disorder like anxiety or depression, they can provide treatment for these symptoms as well.

Exploring the option of online therapy

When you’re going through a breakup, leaving home to commute to a therapist’s office can sometimes feel like an impossible task. If you’d rather start talking to a counselor from the comfort of home, consider exploring online therapy through a platform like BetterHelp.

When you sign up, you’ll fill out a brief questionnaire about your needs and preferences in a therapist so you can get matched with one accordingly. If you find that your counselor is not a good fit for you, you can switch at any time and for any reason until you find the right match. 

Once matched, you can meet with your provider virtually from anywhere you have an internet connection via phone, video, or live chat. You can also message your therapist at any time—such as when you’re stuck in an obsessive thought loop—and they’ll respond as soon as they can. 

What the research says about online therapy

Online therapy started to become more popular at the start of the COVID-19 pandemic, and many researchers have been studying its effectiveness since then. In general, this growing body of research suggests that virtual therapy can typically be as effective as in-person therapy.

For example, consider a 2025 randomized controlled trial that studied the effectiveness of online CBT for adults with depression and anxiety. Its findings report that online treatment significantly reduced repetitive negative thinking (RNT), worry, rumination, anxiety, and depression. If you’re experiencing symptoms like these, online therapy can be an effective way to address them.