im kinda confused... does he like me?

ok there is dis guy at my school and i think he may like me i mean me and my friends went to dis party and he was there and we was hangin out outside and he kept putting his arm around me and then my friends and i sat on this bench swing and it was full and he wanted to sit on my lap but i told him no and in band class he always trys to sit next to me even though we arent even in the same section and he claims dat his section is boring. he already has a girlfriend but when i walked passed him he told his friends dat he went wit me on the down low in kidding way and he always compliments me on my earrings (i hav a lot of earrings) so does he like me? oh and i kinda like him back a little ut the reason i doubt he likes me is cause he is like the really cool type and im kinda not and im not a nerd or anything just not the most popular person around