Nack,
Nice man. Nice. You are on the right track. You need to walk the fine line of not being an asshole, though. It sounds like what you are doing now is good...not calling her...not picking up all of her calls, etc. The key to this game is to make her think you're not interested in her that much. Not interested to the point that you won't go out of your way to contact her or talk to her or whatever...she has to come to you. Which she will, and has. You don't want to piss her off though--don't be too curt, don't be too mean. When she calls, you want to be flirty, pleasant, but you don't want to say too much. You don't want to talk for more than 5 minutes on the phone. If you tell an anecdote, make it about something that she would have liked to have done-- IF SHE HAD BEEN THERE, OR YOU HAD INVITED HER
You've got her right where you want her. Here is where you must be patient, bite your tongue, and reap your rewards. Do not drive her away--be cool without being nice--or mean.
You're on the right track, keep us updated bro.