<human>: I'm 27, she's 23, been together 5 months.

So everything in the relationship is great, except her body image issues have been making me really uncomfortable and a little upset. She says really terrible things about herself. One night, we were in bed together, and she was just listing off every body part, from head to toe, and what was wrong with each of them. I have no idea how to react when she says these things. I know I'm not going to 'fix her', and have no intention of trying to be her therapist. Anything I try to say gets shot down. I'll tell her I think she's pretty, she says she's really not. She says things like she's my fat, ugly girlfriend. It's not only depressing as hell and a total mood-killer, but it's really insulting to me. To me, beauty is a matter of opinion, and no opinion can really be right or wrong. It's frustrating to be told how wrong I am so often.

Sometimes out of the blue, she will say "I hope you don't break up with me". It really just comes out of nowhere! I'll give her a hug, tell her I love her, and she'll say "You're going to leave me for someone better." It's baffling, I have no idea where she gets these ideas. I have never, and would never cheat on someone. I really feel like her words are pushing me away from her.

How do I react to these things? How can I let her know how she's pushing me away (without sounding like I'm going to break up with her)? I'm at a total loss here.

Can you summarize the given text in a few sentences?
<bot>: GF hates her body, tells me that she's not good enough for me, it's really starting to push me away from her