HELP??? Which girl does he like more? her or me?

There's this guy who liked me for 2-3 years. But then he told someone he was sick of my playing hard to get and he got a gf. They been dating for 2-3 months. It seems that he likes her cause he hangs out with her at school but half of the time he ignores what she says and stares at me. The next second he acts cold and indifferent with me. He just goes up and down in his behavior. I thought he had forgotten me because he ignores me half of the time but his attention seems to be on me very frequently. He does know thought that both of us are attending the same college but she is going faraway. I know I shouldn't steal someones bf but he will prob break-up with her.