I think you're moving through this relatively quickly. Pick your jaw up off the floor, you are.
When you're able to keep your focus of him and what he does or doesn't do is when you'll feel much better.
StubbornDyke (I miss you!) had a saying when her partner would do something that was confusing, "Isn't that interesting!" No analyzing, no victim stance, no villifying, just "Hmmmm, isn't that interesting" and go on with YOUR life, your goals, your intentions, your path.
I have gotten away from being specific about my gratitude lately, too. It does change our perspective, little by little.
And I say goof for him for changing his stance, no matter the reason. Makes your life better.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss