How to help someone get out of an abusive relationship?

I work with a girl, very young, who is in a bad relationship. We hang out sometimes and she confides in me on what her boyfriend will do to her. She states he is very controlling and doesn't let her hang out with people usually, and that he takes things away from her when she talks to me. I'm very worried for her, I've tried giving her advice, I've tried telling her my experience with guys like him, I've tried offering her a place to stay (she said she would have nowhere else to go if she left her boyfriend), but she loves him too much and feels it would be controlling for her to want to leave because he is what he is and it's not his fault. She also loves his family and doesn't want to leave, because she is very close with them. Anyone have any advice? I'm lost, but scared for her that she is in danger. She does seem to be listening to what I'm saying, but I can't get her to understand what he does is not okay, and it's not controlling to ask for respect.