How do I become less judgemental and more open-minded to ideas that are different from mine?

Hi, thanks for reaching out!  

It is important to hold yourself to a high moral standard, and to be confident in maintaining the standards you set for yourself, so I am hopeful that you can find a way to not feel conflicted about it.  I think that living your life in the manner you chose according to your moral compass is a positive thing.  I think it will be helpful to focus on keeping an open mind about those around you, that they may be living to what they have established as their standard of morality as well.  But at the same time, it is important that you don't compromise your standards in order to please someone else or to try to find ways to help yourself gain a sense of trust.  I also would encourage you to explore what it is that is preventing you from trusting others; if it is questions about the decisions they make or the way they treat others, then it is a fair thing to pay close attention to how much you do trust someone or allow them into your life.  If it is stemming from past situations with others and you are finding yourself guarded as a result of that, it may take further exploration. 

In your current relationship, I think it is important to communicate with your partner where you are coming from as you address your issues with trust.  If you speak with "I feel" statements to express how you are feeling and why, it may help your partner have a better understanding of where the intention is coming from and make it seem less "overbearing" to them.   

If you find yourself struggling with moving through what happened in your past friendships and with the aftermath of the trauma from them, it may be beneficial for you to talk to a therapist to help navigate through those past things and develop some coping skills and strategies to help in your relationships moving forward. 

Best wishes to you, and please feel free to reach out in the future if you need anything further.