How do you know if a friend wants you sexually?

Okay, I have a girl that's my friend, since 6th grade. We were never really that close, till this year. Anyway, shes really flirty with me, I mean REALLY flirty. And I think shes a really good looking girl, and she seems like a "freak" if you know what I mean. But I cant really tell. So I need your help. Girls, what do you do to lead a guy on, to show you want him, sexually? And im not just talking about sex, and all those dirty things in bed. Im talking about just basic kissing too, as in making out. Im going over to her house saturday or sunday to play manhunt, and I wanna see how far I can take it. So girls, what would you do to show you wanted to get involved with a guy, what signs should I look for? Now, if she is that kinda girl, what would she like me to do to her? What kind of things should I do to turn her on, grabbing breast? Running my fingers from her hair to her back-side? What things will turn her on. Well that's it, any advice would be great. Thanks.