Dontcha hate it.
I'm in the same boat as you. I went to homecoming, slow danced and danced w/ this girl...i mean we were friends @ school, but it seemed like she was interested in me and i was interested in her. So when we danced that night i thought that something serious had happened. AFter the dance I went to an after party and didn't see her till monday (homecoming was saturday). Turns out she fucked another guy satuday night. Fucking had me so messed up mentally for two weeks.
Just the way it is. You have you smart girls, then you have "stupid"girls. (don't mean this in any offensive way ladies)
Good luck on finding a good woman bro.