How do i get this guy i really fancy to like me? please help?

I really like this guy so much, he was in my friends primary school class and my other friends secondary school class, and i added him on fb. See the problem is, he wanted my number to piss me off and was calling me sexy anol as a joke,and now hes being really nice and said to me, i the start i was only trying to piss you off and i really like you now. He is giving me loads of xxxxx's in texts and asks me how was my dinner and said if u tell me what you like about me, ill say what i like about you. He had also texted me one day asking, trying to figure how how could somebody as great and as gd as u like me. He can't pronounce certain letters right and some people say hes ugly but i say hes good looking. So please tell me how do i get him to like me?? is this a joke? im only 13 and I have never liked anybody as much as him before, I'm worried in case he doesn't really like me. ANY HELP is appreciated, sorry for long message. What will i do????