Me and this girl have been talking for along time.. She seems to like me.. She told me she liked me.. And when I was going through her phone I saw my name in her phone and it had hearts and smiley faces.. But anyway I asked her out and she said yes.. But then 15 mins later she txted me she was already going to the prom with another guy and she doesn't want to be dating me and go to prom with another guy.. They're going to prom as friends.. She said she wants to be with me after prom is over..what should I do?