Your question implies that he is now aware that you like him, meaning you no longer have to tell him, the biggest step is out of the way. Your next step could be to invite him to a casual get together (for example, invite him to an event you know he enjoys) and have a good time. If he enjoys himself perhaps he'll ask you out next time.
Don't pressure him or yourself, just relax and have a natural and fun experience. Guys are looking for girls they feel comfortable with, not pressured by or constantly questioned.
