I don’t know how to cope with my partner not loving me anymore.

Thank you for your inquiry.  First off, I'm sorry to hear what you're going through right now.  Learning how to navigate a long distance relationship is tough in and of itself and then to have that information sprung on you about your partner not loving you anymore is doubly as painful.  A small disclaimer before I go into a more in-depth response - since I don't know the specifics of your situation, the feedback will be pretty general, all with the intention of giving you some food for thought, so you can then take action in whatever way(s) you think work best for you.

Coping is such a broad term.  When you think about it, the basic definition of cope is how one deals with something difficult, challenging, stressful, etc.  And when you peel it back further, it can be positive or negative.  I think the first question I want you to ask yourself is this - what are you currently doing to cope?  Are these strategies positive, negative or maybe a little bit of both?  And are there aspects of what you're doing that you think are working, while others not?  I would strongly suggest to first figure out what, if any, coping strategies you're using are positive and working, and then to keep doing them.  Maybe make a list of what they are, when you use them and how you feel afterwards.  Sometimes, seeing it in writing can be a huge help.  I am a big proponent of the adage "if it ain't broke, don't fix it".  Meaning, we don't need to reinvent the wheel, especially if something you're doing is working.  Now with that being said, this is also a good opportunity to see what isn't really working for you and help you start to think about what you may need to add or do differently.  

As I referenced above, since I don't have a lot of information about your specific situation, I may say things that you're already doing/already have in place.  If so, great!  And if not, I hope this gives you something to think about.  Do you have a support system to whom you can turn, so you don't feel like you're in this alone?  A support system could even be just one person...or it could be people who have different roles in your life.  I would start with focusing on that support system because it could be very easy to isolate yourself and start to ruminate on where things took a turn, causing even more grief than originally anticipated. 

This too could be where a therapist comes into play, where you are able to process everything that you're going through in a safe space with an objective presence.  A therapist could also help in teaching you additional coping strategies to supplement what you're already doing.  I personally am a big believer in mindfulness and learning how to bring yourself back to the present moment, especially in moments where you're stuck reliving the past or thinking too much about the future.  There is a lot of material out there on mindfulness techniques and how they can really help with our thought processes, leading us to feel better about ourselves and current situations.  

It also wasn't too clear in your message, but it sounded like there is a level of ambiguity about where your relationship currently stands (if I'm offbase, my apologies)!  It does sound like a candid conversation is needed to be had with your partner and what that all means.  Is your partner breaking up with you?  Or are they just communicating how they currently feel without any follow up to that?  As I alluded to in the intro, long distance relationships really are tough because it forces you to communicate, putting that level of communication to the test.   And while yes, having that conversation I'm sure will be painful, but in the very least, will give you an idea of where to go from there and not leaving you in limbo.

To sum everything up, there are many different ways that you can go about coping and the way you cope will be unique to your needs.  With that being said, I would definitely recommend making sure that you have at least 1 person in your corner to talk things through as well as different coping strategies that you can choose from.  I would also recommend speaking with your partner and getting clarity on where you both are going to go from here, so then you can properly move forward (whatever that may look like).  I hope this response was helpful to you!