FWIW, boundary crossing doesn't usually destroy caring. In fact, when I have had to hold professional boundaries I have sometimes found it painful.

On the other hand, I don't really believe in closure when a T has dropped a person. I think it gets less painful, and I think that having a way to conceptualize this may well be helpful-but closure? I just don't know. I have not seen it.

Can you frame it as you drove by her house, not knowing that it would mean that she would quit seeing you. But to her (or her supervisor) it did mean termination. Hopefully she was just enforcing a boundary that she set deliberately and before you drove by. The no drive-by would be a boundary for some professionals. Certainly not all, but I am sure that your T is not the only one with that limit.

I am sorry this happened. I do not think she should have terminated.