It is impossible to be the girl all the boys fancy, but you can be the one most of them fancy. The trick is to be confident, this doesnt mean loud. Just confident in yourself when you speak to them, be friendly, don't huddle in girly groups, just be yourself and accentuate what you are good at. The trick is just to be nice and friendly to everyone and to actually engage in conversation with them all. Its all in the attitude and a killer smile.