Script for pimping:
"Hey, umm..(Name here)..You're pretty and um..I think we should like..go out this weekend maybe because..If I'm seen with someone as pretty as you..I can be one of the popular kids."
(Make it funny, sound nerdy-virgin-esque, then laugh *with her* and then you can say)
"No really, I think you should come out with me this weekend. Blah blah highschool jargon blah"

Or just go for it man, the worst she can say is "No."