Ladies, how do you flirt with a guy?

I'm a sopre in high school and have yet to be on a date, despite the fact that I'm a defensive lineman on our school's varsity football team. Sad, I know. But I have found someone whom I happen to really like. Shes beautiful, friendly, funny, and athletic. And I have a felling shes trying to flirt with me, but I don't know if it's just wishful thinking on my part because I've never been in this situation before. So how do you flirt? And what would be the best way to respond? Thanks in advance!