Re: Where to go from here
The number is just a tool. Don't put too much weight on it. Try to come from the frame "She needs to give me a reason for me to want her to have my number."
So keep some playful bantering then move to qualifying her. Once she starts asking you questions about you as a man, then its a perfect time to exchange numbers.
Remember the phone number won't guarantee anything with her. Focus on your goal (whether its to sleep with her or make her an LTR) and you'll realize the phone number isn't a big deal.
"All things are subject to interpretation. Whichever interpretation prevails at a given time is a function of power and not truth."