HI B - I've been reading your sitch and as much as WAW behovior is typically alien to how the LBS would expect, i think I've read a lot that this happens. You have a good time, then all of the sudden it seems like you are back at square one. My best guess is you made her think. You've made all these changes and now maybe her reasons for leaving aren't valid or don't seem as vaild anyways. now what. does she admit to being wrong... heck no... maybe just wait it out and see what you do next.
I think you are doing great. You did have a good night. You left her a message and she called you right back for a short chat. You called her again and no response. You said she's been busy right? going to bed early. maybe she just hasn't had a chance. I know - no expectations, but the point is, you don't know why and you aren't psychic, so it'll only tear you apart if you dwell on it.
Hang in there. if she doesn't call by christmas eve, give her a buzz. you are doing really good. Everyone has hard days...
You are a good guy... be happy to be you.
If i can't fall in love... I'd like to fall in chocolate! ~ Author Unknown