Ugh so confused about him :/ anyone help!?

First off she should be walking YOU to 4th period not the other way around, your the girl not his *****, this boy is just playing around with you because since he doesn't have his girlfriend around he's bored and he wants to mess around with other girls because his girlfriend wont know. If he gets all nice and lovey dovey with you for a little and then automatically turns ghost on you, then he doesn't like you.