"Hard to get"

Wuzzup I have a problem with this one girl on my campus that I am very much attrated to. I have been making advances at her and she haas been giving me mixed reactions. She would do something to turn me off,but she always comes back to just keep me around. I wanted to know from all the fine female if females still play the hard to get game in college because if so what should I do? There are too many fine girls on campus for me to focus just on one, but this girl just seems to stand out. If she continues to play this game I might just stop trying to get her. Also how long should I try to get her what is the time limit to where it is not hard to get but just the fact that she is not reandy for a relationship right now.