Im Kinda Confused what does this mean?

Im 17 male Bi-Curious/Bi and well my sister has a boyfriend and his friend does be around sometimes, i would say hello to the boy if i seen him and chat like we are friendly but from day one i met him he always called me gay, i laughed as im that kinda person i can take a joke and just laugh it off, so then he is always like so hows the men and all and im like yeah great you? and he says nope none but i take this as a joke you know. When he found out i had a gf he was like to me "what are you at" and i just replied awh i dont know just being joken as always. Then he would tell me to join football so i can get more lads and i played along saying thats a good idea i will do that, and then one night i was out i seen him and the next morning he was like so was that boy a good kisser i said oh yeah great as a joke i obviously didnt kiss anyone he was just joking but recently im starting to get these vibes from him that he is gay or bi? he is really goodlooking too he is 3 years older than me and he just always seems to bring up "gay" sometimes when you say a joke it wares off but he just keeps saying it? does this mean he is gay and trying to hint to me or just being funny? thanks (: I am in the closet by the way! so its not like anyone knows im bi? and yes i do like him a bit? :S

thanks for any help people! :)