Well... all i do is be myself ^-^
Don't be all girly on him but don't try to act like a guy either!
Don't play hard to get or to get at all. Be friendly and treat him like a mate, keep this going for a few weeks/days, eventually as he gets to know you better things should click into place all by themselves ^-^ it's the important thing in relationships, he has to like you for who and what you are. If after knowing you he still doesn't catch on and ask you out, leave it. He's not worth it. Or you could be brave and ask him yourself... hope this helps...
I might have just been blabbing about rubbish though haha