jbleed - That's cool. Now you have to be a lot cooler about things. You non-committal attitude might become a turn off really quick. You need to settle in between the huge gap between "what-evar!!" and humping her leg.
She needs to know that you wanted to ask her, rather than it being a spur of the moment thing. However, she also needs to know you aren't going to be staring in her window Saturday night.