Does He like Me?

Every baseball game i go to against his team he stares at me. i go to the park one day wit my niece n nephew (13 btw) n he keeps lookin bac at me from left field. last yr when he was praticing n my friend n i were walkin past him he kind of mooned us. i like him at that time too. does he like me or is he just wonderin wat i am doin?