It might just be that your T can't mind-read and hasn't thought to ask you about fantasies or consider your transference. She might genuinely care and want to help, but just doesn't know.

I had fantasies about my T. We're both straight females. I actually told her I was having them. She convinced me to describe them to her. I did. She took it extremely well. And getting it out in the open actually got rid of the fantasy playing around in my head.

I would talk to your T. Even if it has to be indirectly or hypothetical to test the waters.