My two cents...
1. I smell a one-itis coming up... Don't go there, it's a bad place
2. If she hasn't responded to you after 3,4 days, she's not going to respond at all... what young girl doesn't check her Facebook at least daily?
And a few questions...
- why would she respond to your message, as far as she knows, you're just another guy hitting on her via FB?
- do you have any common friends, or do you know where she hangs out?
- is it feasible that you approach her at the restaurant? I mean w/o her father beating the crap out of you?

- have you "tailored" your FB profile so that a chick visiting it thinks "Wow, this guy is interesting, I would like to meet him/jump his bones/marry him and have 2.4 children and a dog/...
Hope this helps... Bye!