phatcow, you have two options:
1. ignore her
2. play games.
3. ok, there's 3 options. You could be crazy and go back with her. A big mistake.
#1 is both the worst and best thing you could do. Why? B/c it's honest real-world feedback for her behavior.
#2 which I don't recommend b/c then you are like her: since she knows how you react, she expects certain responces from you when she says certain things. If you want to be a game-playing a$$hole, give her a responce that she would not expect.
#3 you will be sorry and go thru all this again, possibly no smarter.