Unfortunately, I've given up my spine. I would really do anything short of raising the dead to get her back, just even as a friend...

And right now I really don't know what I feel. I don't know if i'm angry at her for not understanding me, or depressed because she has 'left me'

A little more about our "Friendship" I've helped her with every little problem she's ever had. Whenever we talk, we talk about her and her problems. I've given her advice on everything from relationships and sex to how to how to become happy. Never once have I complained to her or anything, or got her help to any problems.