And if some of your friends are at odds with each other, that is their responsibility, not yours.

I wish I could make myself see it like that. Then it wouldn't matter if I have to be quiet about seeing one set of friends in case the others object (or vice versa), I wouldn't care if people avoid me because of who I'm with, it wouldn't hurt watching people I care about pointedly ignoring each other across me. No-one's fallen out with *me* so obviously everything's just hunkydory.