Let him approach you. A new woman at my boyfriend's job (teaching) wrote him a note talking about she wanted to get to know him better...she thinks his cologne smelled delicious...she thinks he's real cute and cool, she has one child, etc. It seemed desperate and ridiculous. And now awkward since he sees her every day and she's basically put her whole life out there. If a dude is interested, he'll speak...if not, he'll keep it moving.