How can i get him to like me?

ok so im in a new school all new people and there's this guy i like and he acts like he likes me t my friend says he likes someone else and shes really pretty and we have a dance coming up and i really want 2 go with him but i dont think he'll ask me what should i do to get him to like me and ask me to the dance??? plus he was like oo ill giv u my number but i asked and hes lke nope and soo idk im confused