<human>: Can you succinctly summarize the text in 1-3 sentences?

We split up like 5 years ago after a 6.5 year relationship. The last time I remember seeing her she tried fucking someone I thought was a friend on the couch at my birthday party when they thought everyone was passed out. Then shit hit the fan and holes got punched in walls.

After that I kept my core group of like 4 friends and broke off contact with almost everyone else. As far as I know my friends had no more contact with her than chance encounters in public places. Then some time in the last year she started creeping back in. Having dinner with their families and various activities. Then the other night she had a birthday party and they all went. None of my friends sees the double standard here because every one of them would be pissed if I started hanging out with their ex's. 

I don't want to loose my friends, but I would rather start over in that regard than have that bitch back in my world with only one degree of separation. I don't know how to handle this. Help me.
<bot>: My friends are being hypocrites by hanging with my ex and I cannot accept them being friends with her. What do I do?