So absolutely sorry about that. I just wrote this earlier today on another post, but so many who post on this site have such a similar, if not mirrored version of each other's experiences. Your experience might as well have been mine. My ex's anger over not agreeing with her ("WE"RE PARTNERS AND THAT'S WHAT PARTNERS DO!" she yelled at me like any good partner would.

) - but her not agreeing with me; the increasing criticism, hyper vigilance and fault finding; the complete lack of closure after the discard. Like you, I tried to be a sensitive, empathetic, and measured communicator; tried to state things the way she wanted them stated - I was very diligent in trying to do this; after all, why wouldn't I want to do this? I wanted to help her, to save her from the terrible past she had. I was going to treat her differently than all the previously rotten people in her life treated her. Bottom line, eventually it won't matter to them.
Like you, I have also tried, and succeeded, to detach with compassion. What are we supposed to be angry at? Ghosts? In a way, there are ghosts living in them, telling them what to think, how to act, warning them that we are not to be trusted. Really, it's not their fault. My ex was born into a dark life. The cards were stacked against her from birth. She insisted that she had done enough work on herself so that her past trauma's didn't control her, but instead she controlled them. Which she did. To an extent. I really do hope she finds complete peace. She deserves it. We all do.
You are already off to doing the right thing. Reconnecting with friends is so important. Crisis IS opportunity, and that is such a wonderful attitude. I've read other people write that they thank their ex for the "opportunity to grow." I don't. Seeing challenges as opportunities to grow is more about our inner resiliency. You've got some rough days ahead, but you WILL be fine. Let all the feelings flow through you. Don't fight them. Give them life, so that once they have dissolved, any residue left from the experience will be innocuous. Have a glass of wine, if you drink, and listen to Frank Sinatra's, "That's Life," and begin your path back to yourself.