Things will get worse before they get better. Because YOU have changed, that changes her. It will take time for her to adjust. (I think I am just starting to see consistent results with my wife after almost 2 years!)
She talks a lot about divorce recently, but it's just talk (threats?). She has great abandonment fear.
She may be worried that *you* are thinking of divorce. I mean, your behaviour has changed a lot. Maybe you're having an affair? What other explanation is there?
One more odd thing, last nights rant ended when she said "We don't love each other" I said " I still love you", then she stopped talking and walked off. Odd.
She's confused by your new behaviour! You are "less engaged emotionally" with her - which she may easily see as lack of love. It'll take her a while to see that you are sticking around... .