You can't just pick out another person and say your are in love "with" them. Being in love requires two willing participants. If she's a social studies teacher, she surely understands that young people going through puberty often have crushes on older people and that any adult that responds to a 14 year old's advances would be utterly insane.
It's just your body chemistry at work. Hang in there, you will survive and find someone that you have a realistic chance with.