Is AUTHOR wrong in the post ? POST : mobile ya know the drill (TL;DR at end)

I have this friend I’ll refer to as D and she’s been dating this guy for maybe seven months. From day ONE she complains to me about how he ignores her texts and parties with other girls! So obviously after a few months I’m more than a little annoyed with this guy. 

After a particularly bad episode where she runs away from home to cry in a park by herself at night, she calls me because her boyfriend won’t console her or even call because he’s hanging out with friends. Fed up, I message him and ask him what the hell is up for him to leave his girlfriend when she’s been crying nonstop. He turns on mE and accuses me of barging in on their relationship and not knowing anything about it.

Hun for seven months she calls me after arguing with you and I’M the one that doesn’t know anything?? Then he’s playing the victim saying that he needs space from her and that I’m not accomplishing anything by talking to him him. But right after I message him, he finALLY calls her to talk.

Mind you, this whole time his girlfriend knows what I’m saying and checks off anything I send. She’s even saying that she’s planning on dumping him after this.

Then, by the end of the night he apologizes and she takes him back! Never mind the fact that he was more concerned that someone was calling him out than his girlfriend’s emotional health

TL;DR Friend is angry at boyfriend, I chew him out in her place and she knows every word I’m saying, but boyfriend says it’s not my place and I don’t know anything about their relationship