It's hard too. This girl went to a private secondary school here and works in Hollister (and people say you have to be really good looking to work there?) so definitely she probably has a boyfriend anyway.
This is the worst possible mindset you can possibly have, man. You will have ZERO chance to be with her if you have this mentality.
You have to believe that YOU are the prize, that YOU are the catch, that she is lucky to have a great guy like YOU, that YOU are seeing if she is worth being with YOU, not the other way around.
Besides, if she is pretty, chances are she scares off a lot of guys, chances are, many men think like you. As a result, she is lonely and single, just waiting for some guy with the balls to step up and talk to her.