You remind me so much of my (very recent) ex boyfriend. As well as all the problems I'm going through at the moment which made things hard, I'm also a very independant person. I hated the fact that he relied on me so much, I was the only one he turned to, the only one who could make him feel better. There was so much pressure on me to be there for him ALL the time I couldn't cope with it anymore. And I also worried for him, as I knew it's not healthy to rely on one person (like putting all yor eggs in one basket...). You need to learn to rely on many people - friends, family AND your girlfriend. That way not only do you get more feedback, more advice, but it means theres less strain on her. My boyfriend and I broke up last week, he rings me everyday saying if I don't give him another chance he'll commit suicide. I love him so much still, I never want him to hurt but we're not right for each other. But I find myself lieing to him, giving him false hope that we may get back together in the future so he'll carry on with life.
i don't know what advice I can give, other than try talking and spending time with other people - or you may be pushing her away.