<human>: Can you succinctly summarize the text in 1-3 sentences?

Me (27 M) and GF (23F) just broke up because she feels that she is not emotionally stable enough to be in a relationship and doesn't want me to end up hating her. She came over and opened up to me a little about her personality disorder and troubled past, but left out some major details she didn't like to talk about. She was Baker Acted when she was younger and used to cut herself as a result. Now she deals with depression and said she has felt "off" for the past couple weeks. This decision came after she spent a night in the hospital with a severe infection. It seemed incredibly impulsive.

We hadn't been dating long, only a few months, but I've never felt so in touch with someone before. We've had no fights, have always been able to discuss anything, even if we weren't in agreement, and I've never felt like I've been in a more healthy relationship than this one. She told me I'm the best boyfriend she's ever had and I make her incredibly happy so this was all very confusing to me.

This was totally out of the blue and unforeseen. I feel like most peoples reaction would be that they just dodged a bullet, but I've never felt more like I should be there for somebody. She mentioned how her traumatizing past has strained all of her relationships in life, especially with her family and with men. I don't know where to go from here. I've been giving her space but don't want her to go through this alone. It seems like she needs someone who refuses to give up on her. Luckily, she's on vacation right now with her family out of the country so she'll have some time to clear her head and to have some space. I don't know how to approach this when she gets back. 

We've hung out once since we broke up and it was as if nothing had happened, but outside of that she was been very distant when it comes to communicating. Any advice on dealing with a significant other who has dealt with a troubled past or depression?
<bot>: My girlfriend left me due to her depression but I don't think she should go through this alone, need to know how to be there for her without overstepping any boundaries.