Not to be rude but a 2 year old could know the psychology of this girl. She used you and has no interest in you. You are right now ingulfed in self pity because you cannot stand this happening to you. Your ego was wounded. A natural thing to happen! All people think that they are different and invincible and nothing bad can happen to them! (I forgot which psychologist believed this). But generally people dont predict the worse to happen to them. Though all people give u the same advice u are deaf to what they say. Advice cant reach you and suggestions dont affect you. The best thing to do.... go for a swim and look for another girl to hook up with!