If you don't ask girls out you'll never be in a relationship. Believe me, I know. After several rejections I started waiting for girls to come to me, as my grandmother advised me to (she reckoned that the right girl would only turn up as soon as I stop looking...). Needless to say, it didn't work. Recently I started to take a more active approach again, and managed to pull in two seperate bars on two seperate nights within a week of each other. And I feel much happier and much more self-confident now that I'm taking the initiative.
So yeah, ask girls out. Waiting won't get you anywhere. You have to be in it to win it, as the old cliche goes...