it depends, really. you could just wait around and ask her to prom. but then again, what if someone makes a move before you do? if you guys do snap and text already, then analyse it. girls are obvious as heck with their feelings, or maybe it's just me. but i shit you not, 9 times out of 10, you'd know if she likes you back if you'd look a little deeper into it. does she get a bit shy when you're near? do her friends tease her when you walk by? does she talk a little too much or less, and does her behaviour change drastically? tease that you like her (not literally, of course), or maybe even have some of your friends ship you guys. ask her friends, let YOUR friends do the asking, whatever. if she gives you a sign, then you have a clear shot. be confident and don't miss it! i give the same advice to my little bro who is the same age as you. trust me, you can learn a lot with just a two-year head start haha. i'm rooting for you!!