@brebre933,
Is it possible that there is "introvert" and " extrovert" happening in this relationship. Maybe you are the more quiet one and she is the more outgoing one.
She should answer your questions but not if there are 20 questions on-going, it's easier to not in that type of situation or it will just continue and drive anyone nuts.
What people in my opinion fail to recognise is something so simple. She went out with you. She is still going out with you. If she wanted someone else, you would be out of here. Keep repeating that to yourself when you see her bubbly self just talking to new and old people. And smile.