I think what that therapist did to you is terrible. I understand that you don't want to hear that necessarily, that you still have positive feelings for her. And that you care what she thinks (even mistakenly) about you.

Realistically -- you have a right to be in the area, no matter what she might think. What can she do to you anymore even if she does think you are stalking her? Not likely she would call the police and even if she did -- you are doing nothing wrong.

On the other hand, does your sponsor know about you and this ex-T? If so, perhaps she would understand why you would like to change the meeting location, if possible.