You said you had a great time with her three weeks ago and now you don't want anything to do with her.
Perhaps you have gotten a little of what you hoped for and are now out of 'crisis/survival' mode? And further, perhaps because you've moved out of that mode, you can take a breather and figure out what you really want?
I'm not sure if this is a normal phase on this rollercoaster, but it would make sense to me.
From what I've read, everyone seems to be saying that this is a good place for you to be. That you are getting closer to being able to lovingly detach and allow your wife to continue her journey of discovering what she wants.
I'm probably biased from my own situation, but I sometimes wonder if this is all some sort of rebellion/power play that we are going through with our spouses.
The mintue we say we want them, they say, pfft...well I don't want you. Then the minute they act like they want us again, we feel, pfft...well I don't want you anymore..I just want you to want me.
I truly don't know.
Tis just something I've been wondering about recently.