I think I might hate my best friend...? Help, please.?

Ok, to start off, I've known this girl for a little over a year. We're always together, we always talk, blah blah blah. But recently, I've just started, well, resenting her. I guess its jealousy, I don't know. Its just that she excels in EVERYTHING. She makes me feel like and idiot, and that I'll always be insignificant to her. I know she doesn't feel this way. I just can't take it anymore. I want this friendship to be over. What do I do?