Heh, I've been in your position before. I agree with a lot of what bebekid advised. One thing that I would add though is its important you make sure that you are just attracted to him, nothing more. If you find that you are crushing on him, thats a completely different issue. If its just attraction, he probably won't mind if you're checking him out :). Just try not to be obvious about it or do it so much it becomes awkward and changes things between you.