How do i know if he likes me?

well there this boy and well every wednesday we all go to this club called junction its a place where we all hang out like u would. it has a pool tables and a disco and a gym where u can play football.well when we go he always playing football with his mates and gooffing of at me and my mates r always saying stuff to my like go and hang with him and all that.i realy like him and well last wednesday we went and on his hand it said( i luv u a) and well after i found out by my mate cuz she told me everywhere i was he was there to looking at me and watching my every move and smiling at me.even his mates where and this wednesday just gone he was doing the same and school he was doing it aswell and on this chatting site his mate put as his status so and so loves you aka me and he as been acting realy wierd around me.i dont know wat i should do,what would you say do you think he likes me or he is just being annoying plz help me thanks