My ex and I broken up a little bit over a year ago and it was a 6 yrs relationship. I have a couple of friends that are still friends with her. I hung out with them regularly, one is my ex's old roommate. Since last year, I have cut off my ex from my life and never ask/talk or mentioned her name to any of my friends. I avoid know what's going on in her life and doesn't want to talk about her, period. I never had to say this, a few of my other friends knew so they never bring her up. So the couple of friends that are still friends with her would talk to me about her and it really bothers me. I usually change the subject or avoid answering but they don't seem to get it. I don't want to come off bitter (which I am). If I'm truly over her then I wouldn't care if they talk about her or not (in this case I'm not). I think I have to say something to them next time they bring up my ex but I don't want to come off as being bitter as that will eventually gets back to my ex. The mention of her name alone would make me cringe and I get really upset because I would think about all the shitty times I went through. I just want to close that chapter and move on and let times clear my memory. Now what should I say to them so that they know I really don't care to talk about her anymore?