Guys are so fricken confusing, please help!?

this kid was at my house saturday for a party and i dont know if he was joking but he sent two of my sisters friends over and to tell me he likes me and i was like uhhh and i talked to them later and apparently he sent them there and wanted them to comeback with the response. they told him that hated him wich i didnt say. anyway that same night he sent me an email on fb and asked for my phonne number. keep in mind he has a gf. anyway what do think was he playing me trying to be friendly ( cause we barely talk) etc. then wednesday he asked my mom if i could come with him to a restraunt and if they could come to. my mom said yes and so i invited my friend so me my mom my brother my sister my friend her parents the guy and his brother and his grandpa were there. he kept pokiing me as we walked in then he screamed out i like his little brother. later i was sitting with my friend and my sister at a diffrent table and he came over and sat next to me. i didnt giveh him much attention because i was gossiping with my friend but when i did he just listen and joked back. i have ALOT of guy friends and they do not act like the way this guy guy did. then we were just sitting there and in awkward silence and my sister doesnt like him so she was like what are you doing here youre so gross, joking around with him and he started spitballing the girls and i and then i went home and emailed him and was like oh thanks i got a spit ball in my hait thanks very much to you and he was like hahahahaha.... anyway i saw him today( friday) and like he did wednesday wich i diodnt mention was play me in our judo cl randomly again and he grabbed me by my belt while i was doing my hair and was like come on missy we are playing each other. then after he wailed me around it was the end of cl i got changed and stuff and he was like watching me. sorry this was soooooooo long but what do you think. and it was really weird cause we dont talk at all unless he is teasing me with his dad. thanks(: