Nice guys who are playing by the rules and still can't win are usually playing a different game.

The REAL rules of the game are out there; it's just up to you if you can play by them or not.

5 simple things:

1) Friendship Zone: Avoid at all costs.
2) Never be a doormat. That means you don't have to say yes to everything. It's ok to say NO. BE A MAN, not a piece of rough textile used for brushing the dirt off shoes!
3) KINO! If you don't know kino or how to use it you are at a massive disadvantage. Go read up on it.
4) Take care of yourself and things will take care of themselves; that is if you try your best to look presentable at all times and not go out to malls in 5 yr old t-shirts and shorts and Crocs, chances are when you pass a girl you won't feel ashamed, but you'd wonder if they secretly checked you out or not, and it's highly likely they did simply because you looked your best in the situation. Confidence is a very big trump card.
5) Lastly, CONCENTRATE on your CAREER/STUDIES. It may seem counterintuitive, however sometimes all you have to do is nothing but your best to be who you want to be and that kind of effort attracts the opposite sex. Serious.

I'm nice, but if I really put my mind to it, things are just cause and effect. And the worse is she can say no, then you move on. D'uh.