<human>: So, I'm living with a girl who is AMAZING. I've only been living with her for a few weeks but already I feel really connected with her, and most importantly, care a lot about her. It's entirely platonic on my end, although admittedly, I would like to think that if she was single I would at least ask her out. But that's another thing entirely. 

Here's the issue. She's dating this orthopedic surgery resident [29 M] who is REALLY immature and self-centered--a ton of the surgery guys are like that; they come from upper-middle class, have had everything given to them, and have only experienced school-related issues in life and not very many challenges outside of that. They have been together for 2 years now. As it happens, he keeps treating her really poorly and is really manipulative. Seeing her upset is slowly but surely biting away at me and is making it really hard for me to feel...at peace, at home. I really want to tell her how I feel about their relationship with hopes of helping her and improving her life for the better, but I can't help but feel that that's not my place. But at the same time...I really care about her, and I want to see her happy.

So what do I do here? I know she respects me enough to the point where if I were to voice my concerns she wouldn't hate me or anything. But, should I tell her? Or would it be better to just watch their relationship run its course? I don't want to come across as a home-wrecker, either.

Can you give me the gist of the text in a nutshell?
<bot>: Living with roommate; close with roommate; care about roommate. Roommate is in a crappy relationships. Should I say something?