<human>: Can you give me a shortened version of the text?

So I'm in quite a bit of a sticky situation. My best friend and his GF have been dating for over a year now but something changed after the one year mark...he started to change for the worse, he would say stuff really mean to her to the point she was in tears and had to excuse herself. Also, he would say things when I said that he should cut it out like "If this falls through, I always have (other girl who likes him)" behind her back when she excused herself. The problem 1. Is that I can't say anything to her and she won't listen because she's my ex from almost 2 years ago, like we talk like friends and stuff but I'm not in any position to make relationship advice to her. And problem 2 is that she is heavily religious and believes that she can just forgive him and move on and that her relationship is about forgiveness and also she believes that they will be together forever. Now finally some good news is that someone at the school reported the verbal abuse to an administrator and they've been forced to break up by her parents. IMO she seemed almost relieved, but he wasn't, he kept going and pushing her to stay together with him, regardless of her parents wishes and he won't get it out of his head that he needs to let her go. So now I believe that she feels trapped and doesn't want him anymore, but he is convincing (almost forcing) her to stay with him. Really need advice on what I should do? Side note: I am close friends with the girl's best friend and she is also against the relationship so I could possibly get her to influence the abused girl.
<bot>: best friend verbally abuses GF, parents force them to break up when they hear about it but my friend won't give up, please help.