I'm so sorry you have to go through this too, but you sound good. Things get so much better when you can watch from a more distant place and trust that everything will work out the way it should.
It's so painful when the person you love and thought you were going to spend the rest of your life with decides they want something else. But, it has NOTHING to do with us, and everything to do with them. What they have done says more about them than it does about us. I've had to do alot of repair to my self-esteem before I could accept that last statement as truth.
Life is wonderful and we can make the best out of a horrible situation.
I hope you're doing okay and today is wonderful for you.