Here's some advice: don't ask people online. We don't understand your situation, and could be giving te the exact opposite of help. It's also better to ask someone in real life because if their consigli doesn't work, te can beat them up. The worst thing te could do on fanpop is send someone threatening IMs and segnala everything they say. Which is really just annoying.
Here's my advice: don't do anything. Just walk da him and don't even acknowledge him. Guys hate that. And then you've got him trying to get YOUR attention. Works for me anyways. Ah I Amore being a girl :P