Alright. I'm the kind of person who would be considered socially retarded unless amongst others of my kind, that of course being nerdy RPG/video game/conspiracy theorist types. On occasion I toss things up on places like Craigslist personals areas with some banter about who I am and whatnot... and usually I get a few responses from people who are amused/enthralled/whatever, some of whom I have actually befriended.
Well, you're going to have to man up and say no at one point or another anyways. But honestly, there ARE networking/profile sites that aren't relationship orientated, like Nexopia or whatever. Before you do tell this girl to get lost, just get to know her first, she obviously wants to get to know you. And you don't even have to have anything in common with someone to love them.