Hey - did you say you chickened out asking him to a movie?
Well give it another shot...but angle it after some general chit chat. Kinda ask him if he likes x type of films, then say you do and casually suggest you go to see it together.
Try not to be so nervous around him; just be laid back, smiley and YOURSELF. If he still doesn't take the hint, you won't have lost anything or feel bad about being rejected etc as you were simply being yourself, without opening up too much.
Hope this makes some sense.