Asked you out for lunch. Acted all charming and giggly at lunch. Then asked you to her place, alone, for drinks. It is sounding very good! My guess is that you won't have to do much figuring, that she is not shy about making the moves herself, lol. Good luck.
Now, I am fully concious that I shoud act cool and takes it as it comes but I still need to know how to behave when I go to her place and wether she really only see me as (drumroll..)
the politeness thing is just that in the past I have aked many times like a real jerk around that girl. Totally ignored her when she talked to me, got pretty drunk and rude around her, and probablly a couple of other things...