I've known this fella for eight years but we've never been very close, mostly through mutual friends. As far as I know, he's only dated one person during this time and has been single for about 4 years now. I spent some time with him recently and am... overwhelmed with terribly surprising attraction to him, physically (which is a novel experience for me) and on other levels. He's exceptionally smart and witty, making me laugh the entire weekend.

He's nerdy, artsy, and tends to be a bit introverted. Can anyone give me some advice on how to possibly approach him and make him aware of me? Without coming on too strong?