<human>: Can you summarize the given text in a few sentences?

Today I'm thinking about breaking up with my girlfriend. She's out of town for a while and now I'm just making pros and cons lists in my head that would clear up this mess that is in my head.

She's a nice person and for the most part I like being around her but she has some serious issues with her self-confidence. Coming from a troubled family she has many issues regarding her self confidence: often she thinks that she is stupid, not worthy of being with me, sometimes she suggests leaving hear as if I would be better off without her.

Truth to be told, it's not easy to be with her sometimes and I often get tired of comforting her that she is not that horrible person that she thinks she is. Because really, she is not that bad a person and I love her, but it gets too man hard to continue sometimes.
<bot>: Is it possible for a person with a lack of self-confidence to change? Should one break up with such a person precisely because of that reason?