How to ignore someone you like?

You know to get them to chase and realise you are what they want? I already have a girl who likes me alot but she won't stop playing games. She plays hard to get and I approach her, she then speaks a little bit and continues to play hard to get. I start to lose my patience after awhile. I know that there is chemistry but she just won't admit it and then when I least expect it she will talk to me like I'm her boyfriend.