   So my ex and I have recently started talking  to who wanted to try again after about 4 months, two of which were spent dating a mentally abusive boyfriend, one that she was seeing before I dated her.  I was under the impression she wanted nothing to do with him, however her “friend”  (lets call him J) is always trying to get her back with him. I know J knows how much emotional pain and stress he caused her yet he still tries to justify it. I’ve told her that I don’t like J multiple times and yesterday i found out she went to dinner with him to “talk about things” so I told her I cant be there for you if he’s still your friend, even though she’s known J for a lot longer. 

sorry about this its my first time on here

so AITA for telling my ex after discussing getting back together to choose between her friend or me?