Of course your gonna think the worst because you kinda put yourself out there by letting him know you have feelings for him. But, the question is, does he know its you?
Oh and I can identify with the staring thing and feeling like a guy is out of my league...
But at least give it a chance, let him know WHO you are so then you won't have this suspense of wondering. Plus, if he isn't into you like that, then you really didn't lose anything but a meaningless crush. You move on.
If he is into you, then look at all the opportunities that can open up for you both. Maybe he is just as shy as you and likes you just as much. Who knows? Point is that you need to find out and you should definately tell him who you are before he starts to get freaked out and thinks he has a stalker.