I m a freshman in high school, and looking for some advice on a girl.?

The Girl I have a crush on has broken up with her boyfriend of over a year just over 2 weeks ago. She has snap chatted me almost constantly since then, usually responding almost instantly, along with three, two hour long facetimes. The thing is at school she shows absolutely no interest in me, in fact showing more interest in my recently taken friend. What should I do?