Oh I feel this w my friends too, all the time. It’s honestly exhausting. I try not to think about it much and I try to avoid situations where I will have to see them with other people. Usually I can manage it this way so that I don’t get triggered nor be bad to my friends.
this sounds kinda rude i didn't mean to, i actually suggest talking it out with a professional if u have the means to. its good that you are aware that this isn't normal because many people who feel the same as you don't know and act insufferable
so basically i have this friend, and i hate him having fun w people other than me. and like idk