**** the FB chat trick.
My mate was in a similar situation: he was friends with this super hot chick on FB (they'd only met once or twice, but had added each other as friends; as people do to boost their numbers).
Anyway, about a year ago, he noticed her status was single so, as he was single himself, he messaged her and asked her out for a drink.
The rest is history. They moved in together two weeks ago.
I guess the moral of the story is this: he who dares, wins.