Yea Hobbit linked a good post, basically spells out what i was gonna say. Your mistake came after the deal when you started acting insecure about it, asking if she liked you and the time you spent together...if she didnt you'd never have gotten her, she knows you know this so the questions come accross as you being insecure (just seeking validation).
Since your discussing it here, id assume you were looking for more then a lay from the girl, but as Steven Segal says, "Assumption is the mother of all fuck ups"....so, did you just want a lay (or series of lays) or were you looking for some kind of relationship here?
If not, move on and dont bother with her unless she makes it easy.
If you see potential in an ongoing relationship then the move in my opinion is to be very direct, almost caveman like. Just be like "Im not the one nite stand type and i'd like to keep seeing you, but if thats not what your looking for i understand...i just dont have time to deal with smoke and mirrors or games...i think we are past that. So let me know what you think."
Id suggest doing something like this in the most direct form...in person, over the phone, etc. Being direct like this will show your confidence again re-enforcing what she originally thought about you. Not only that it may drop the games from her end and let her know your intentions.
Anyways worst case scenario you learned a lesson you can carry on in the future. Social Dynamics is always in effect, all around you 24/7. People are wired to constantly asess their social bonds, which means you have to keep up all fronts all the time, otherwise they will be seen as just that, a front.