I'm glad you had some validation for your feelings with the current T, about T1. You will work through this, it will just take time and patience with yourself. You might need some sort of closure, some significant act to close the door on the last T. Some people, like when they get divorced or something, have a ceremony or something to mark the end. Maybe you could do something like this with your current T, something symbolic to close the door on the T that hurt you. It won't help 100% but it can help some. I went through something, not what you went through, but something that hurt me once and I symbolically burnt his business card to signify THE END lol