Thank you for all of your replies. I'm only living here until May, so finding another place to stay wouldn't work. She hasn't brought him here at all, probably because she knows I don't approve. She actually told her parents everything that he's done and while they were broken up she told me that they hate him now. She is pretty close to her parents, so I can't believe that she would go back to him after everyone who cares about her told her he is bad news. I've heard and read about abusive relationships, but this is my first personal experience and and just don't want to do something wrong. She is one of my best friends and it kills me that she is putting herself through this.