I just came back from spring break recess and I haven't seen my crush in a hole week why was he acting weird?

i saw him coming out of the cafeteria i saw him and he looked at me when he usually stands he didn't stand there he keeped walking as i was talking with my friend he looked back at me like two times and i keeped running into him in the hall he usually stands and talkes to he's friends he did'nt do that