I have a problem that has haunted me somewhat since I hit puberty. Whenever I like a girl, I will almost obsess over her, not in a creepy way, but I will not be able to get her off my mind and stuff and I will be really nice to her and the usual. Well as soon as I get her to like me back and show affection towards me, I immediately don't like said girl anymore. This has happened about 5 or 6 times. I am going to be a sophomore in college this year, is this just immaturity or just a really long phase? Does anyone else have this problem?