(((((Treehouse)))))

You've gotten a lot of good responses, and I just wanted to add some hugs,
....and a thought that I had:

Maybe as people in your life are seeing how you are changing and growing, it throws the relationship off-kilter and they are responding to that. Even maybe without them knowing.

So yes, you are the common denominator, but not because you are bad or you are doing something wrong, but because you are showing strength, peace, self-assurance, and even self-care. I am thinking that with all the hard work you've done in T, there would have to be some changes in you, in your day-to-day interactions with people.

It does all sound really stressful and scary - keep doing the best you can and remember to use your coping skills.
We are here for you, and T is too. I hope you will ask him for what you need. Remember - he is responsible for taking care of himself and he will do that. And it only takes a few minutes to leave a voicemail.