I too had ET for my Old therapist. He was not the type to disclose if he had similar feelings so I never knew if the feelings were mutual. I don't care to know anymore but at the time, wanting to know was quite consuming. I felt as though, if my feelings of sexual tension were NOT reciprocated, then I could not trust my feelings at all. Feeling as if they weren't reciprocated would make me feel less than and powerless.
On the other hand, I felt that if they were reciprocated, I'd be happy but I'd also be able to acknowledge it was something we could never act on and I could move on. Additionally, feeling as if they were reciprocated would make me feel an equal. It seemed that the reasons behind wanting to know if the feelings were reciprocated were more important than the feelings themselves.
I do know that the last two times, aside from my therapist, I felt a sexual tension between me and someone else, the feelings were reciprocated. I don't believe for a minute that my feelings arose out of nowhere in regards to my therapist and I don't believe they came about just because he listened to me more than anyone had ever done. If the feelings weren't reciprocated, I believe that there was something unconscious going on in him that contributed to my feelings developing. Some need in him to be desired. IMHO.
