Signs of byfriend still not over ex girlfriend?

-goes over to her house and hangs out with her everyday -he flirts like majorlyy -the girl finds out that her ex still likes her by just talking to her ex-bf's friends -he acts really really nice to her more than anyone else -he waits at your locker (at school) -he walks with you to your classes (at school) -he calles you 3 times a day to find out how you are and what you're dong -he asks you out