Most Helpful Guy
just because someone looks at you does not mean you belong together
Most Helpful Girl
Without talking to him, you can never get his attention. So just find a way to talk to him. If not at least try to look at him with eyes on him and a smile acceptingly. Guys (or at least most guys) don't understand shy smiles, they take it mostly in a way that means that the girl hates him or finds something funny in him. Just a "hi" can work wonders. Make that a simple routine.
Try and find ways to let him know of your existence. You may know his name, but nothing wrong in asking him his name and telling yours in the process. Perfect time to get his contact details. If you have a cell phone, give it to him and let him enter his details and give himself a miss call so he has your number too. Don't ask him his number directly.