Um.... did she use me?

most young girls do not actually fall in love with their boyfriends . there is more of an infatuation with the significant other. Although you held hands it was not really symbolic of the way she or you feel about each other but rather a way of letting other students know you are a couple. By letting go of your hand it could be that she does not want to be seen with you in front of people she knows. my advice, drop her like a bad cell phone signal.