I also want to second how amazingingly strong you were to recognize what was going on for you and for her and keep them separate so you could see it was time to leave. I know it seems like it took a long time but these are huge overwhelming feelings and they take as long as they take. I hope you find a new T worthy of you soon.
Jones I hope you see this. Thank you so much for your comments about rupture and repair. They provide an incredibly useful framework for how I am in relationships, usually I make sure I don't have much at stake, with my T I have so much invested I'm paralyzed because I think I have a vulnerable sense of self and poor relationship skills. I hope therapy helps me learn how to extend my skills because right now it just feels like a bottomless pit of pain.