Faults, faults, faults. Stop worrying about your faults! She likes you. You already won her over. And if she truly loves you and isn't scared away yet, then you don't have a whole lot to worry about. Also, there's one thing I want to make clear - your friends are right about being yourself. BUT, you can't be yourself if you don't like the person you really are. This anxiety comes from abhorring your own self image.
Saying you don't have the ability to change your own confidence is like saying you're a victim of this situation. Bullshit! You can change it all. But nobody, mark my words, NOBODY ever said it was easy. Put your guts, passion, creativity, and soul into it and I promise you'll prevail.
110 percent, nothing less!!