Only use the first part of the note: "so its awkwardly quiet in here but i just wanted to say Hi :)"
Then the ball will be in his court - it's better to find out if he's an idiot, ******* or pervert *first*, and it also gives him an opportunity to say something in return other than "uh, what now?" Less pressure.
Go for it girl!
Sure or just push him into his locker when you brush next to him in the hallway and look back and smile. =) Then next time you see him youll both be a little more comfortable lol
Does he have a book out or just like a lost kid in the wrong place? lol Speak!. Say, Hey. whats up? Whatcha doing here, trying to learn =) ?
Good luck .
Your smile should tell him all he needs to know.