my DP and I have been friends with a couple for three/four years lets call them Tim and Kay. We used to meet up for couples meals at each others places, and meals out. Over the pandemic we did a lot of online games together and long walks. We had other friends who would join occasionally but the four of us had an ongoing group chat.
After one event two years ago where I thought Tim really crossed the line in putting me down in front of others, I made the decision that if anything happened like that again it would be a deal breaker. Tim is a big personality and an interesting guy. But he is incredibly self absorbed and very right wing with some unethical opinions. Kay is very quiet but very sweet and barely talks unless encouraged. They weren't great friends as we found out soon enough that they were just friends for fun chats and weren't very supportive though difficult situations. Fine
About a year ago. Tim put me down again in front of others. That was it for me. I had no interest in entertaining the friendship any more. My DP still meets up with Tim and the other guys we know for beers every now and then, which I'm fine with. Every time they invited us out we just claimed to be busy with projects. I don't know how much they have caught on that all is not well as DP still meets up with Tim and Tim just keeps saying how we should all get together again as a four.
I'm going to another friend's party this weekend. DP is away with work but I will be going. I don't know many others there other than Tim and Kay but really like the birthday girl so don't want to let her down. (She vaguely knows the situation).
I just don't know how to act around Tim and Kay anymore. It is likely they will know that we have been meeting up with other friends as I'm sure some friends have posted on social media. I really don't want to explain to them the real reason. I feel awkward and weird about the whole thing. What do I do?