Why do girls lie that they don't like y guys?

At my school all the y bad-*** jerks hit up with the hottest girl. Rappers are y and same with some athletes. I used to be nice in middle school but now in high school I got on the bball team and get good grades. After that I got this attitude for example when I am walking I hold my head high and have this don't give a **** smile. Now I got a freakin hot *** girlfriend