How do i get my crush to like me?

ok so i like this guy, hes super nice. i didnt start liking him until tuesday, but ive known him since the beginning of september. he just never knew me. he said he always saw me and wondered about me anyways this week we really got to know each other, started at our track meet on wednesday. he asked me what my name was cuz he forgot, i told him, he smiled,and we just talked for a long time. then for the rest of the week everytime i entered a room where he was in, he waved at me or said hi and always smiled. talks to me whenever he can. so does he like me too? or is he just being friendly? how can i get him to ask me out? we have no cles 2gether, but he;s in my best friend's homeroom.