Not enough confidence to say hello ?

I would walk up to him but not directly at him (pretend your going to a cl or something) and say hi (insert his name here) whilst smiling. Don't stop walking ! Its fair enough that you should be nervous at it shows that you really like this guy so don't worry! Try saying hello to him for 3 days in a row (only once a day) if he doesn't exchange the offer then i'm guessing he's lost interest (sorry!) Overall I wish you heaps of luck with this special guy! :)