As you yourself put it, it is your crush, not hers, so be a man, step up to the plate and talk to her or just go away and forget about it. Give her a break, tell her how you feel she will either be pleased to hear it or just brush it off either way you win. If she is p;eased then you can try to embark on a relationship, if she brushes you off then you still win because you know where you stand and can start moving on to the next crush and repeat the process until you click with someone.