Like two weeks ago, a girl came to where I work. She worked on a project with us for 3 days. And in those 3 days everything went good, got some IOIs but still, nothing really tangible. She's a 9.
At the last day, I asked for her last name and she gave me. I told her I'd add her on facebook. She said sure.
I added her, no response for a week. I see she sent a new status so it's not like she hasnt seen it. A girl friend from work also added her a few days later. No response either.
Last week she came for another, this time real short project. Stayed under 30 minutes. At that time, my girl friend told her there was this nicely-paying project, and she wanted to work with her; but couldnt, cuz she never accepted the facebook friendship thing. It's nice to have a girl who supports you like that

. But the 9 said "oh ok, i understand" and that was it. Before she went, we ran into each other in the office and I acted like I don't know her, but in a playful manner. I said hi and gave her my name, shook her hand. She did the same and we laughed and parted ways.
QUESTION IS
She still hasnt answered the facebook friendship thing. I know she won't, if things stay this way. And I know there isn't much that can be done. But still. WHAT SHOULD I DO?
If I don't do anything, there's no way I'll get the girl anyway. So give me your suggestions, experimental scenarios and weird shit you never got the chance to try, and together let's pick one and try. Since I'll never see her again in the status quo, who cares?