Re: What the hell happened?
Okay, my advice is gonna sound a little harsher than some of the others', but just hear it out.
It sounds to me like you both have/had it kind of rough (outside of school and each other). From what I can tell about her, she's trying to deal with her problems and mellow out, and judging from your zeal you don't really want to mellow out. And both of those are choices that're okay for the two of you to make, but to me it just seems like you two drifted apart. It doesn't mean she doesn't care about you any less than before, but that she might think you and your distinct personality would distract her from what she's trying to do in her life.
My advice is to just give on being her boyfriend, but don't give up on being her friend.
BUSHIDO IN ALL GIVEN TO YOU BY LIFE
Now you see why my MySpace name is "I think too much. . ."