If t was being mean, then There is no way you should go back.

Not saying this is true for you, but for me, sometimes T will say something that is no big deal to them, but strikes me as a big deal. For example she might say "that's your dependency" when I am struggling. For her, it is a fact. For me, it feels shameful. I know when I was first accepting that I was an alcoholic, I would be hurt/offended when someone in AA called us all drunks. Obviously only you know if t was saying something like that, where no offense was intended or if t was being a jerk.

You sound very hurt, would it be a bad thing to sleep on it, to postpone making the decision for a day or two? Or, if this t doesn't get you, could you do a little research into finding another t?