Don't Flirt with girls. Shyness Put spigetti in your mouth with it hanging out, and wiggle it around. Make noises with your body. Religious and Rasist jokes are the best. I'm sorry, but I'm not telling you mine.
Girls seem to love sarcasim.
If she is dating tell her that her and another guy would be a perfect couple. Girls seem to love this one. Contradict every word that comes out of her mouth. Make them open the door for you when you are out. Compare her in anyway to Britney Spears to her face.