Why guys act like they like you but

There's this boy in my 7 period class and he flirts with me but I don't know he acts like he likes me but then he don't on facebook what should I do he talks to me in class and flirts big time with me But then it seem he's in to some other girls 2

Some people chase the ones that run from them and run from the ones that chase them. When you're dealing with someone like that, just keep running. He's more interested in the ego trip than having a real girlfriend. Make yourself "the one that got away."