I know this sounds cliché...but just ask her out and be yourself. If it doesn't work then it wasn't meant to be. If a girl/guy can't handle who you are then they can't handle dating you in the first place. Of course, and I hate to say this I really do ): If the only thing you're basing your crush on is her appearance then it's no "love" its "lust". There is a tremendous difference.