My wife has started acting in a similar fashion. For the last year she'd be much more positive and not struggling with negative emotions when we were together. But lately it seems she's struggling with anger, bitterness, etc. The big difference is now I'm the one with a smile, I'm the one with the positive, friendly attitude when we are together. I've begun to move on and plan for life without her. On top of that, the financial burdens she's now under along with the work and life stress I think are weighing down on her. She had wanted to trim back our lifestyle and complained I wouldn't. I was more than willing and have done that now. She's still shopping at Nordstrom's has a big expensive new SUV, etc and I think she is realizing she's put herself exactly where she didn't want to be.
So my read on the situation is my wife is processing. She's seen the changes I have made. She knows they are for real and permanent. Now she sees I'm back to the man she married, the man she wanted me to be when we separated, the man I was desperately trying to get back to being. So what's she to do? I think that's the gist of the big question in her mind now. I suspect at this point her pride and underlying fear are keeping her from acting one way or another.
If we really want to love, we must learn how to forgive. - Mother Theresa