From the outside (reading these posts), your relationship with this T definitely has a progression in that it is getting more personal and involving on both ends. As I said before, it is hard for me to imagine that working with you is not quite stimulating for this T. A stimulating, highly productive work relationship with a compatible person can, by itself, create a form of sexual tension and something that feels like attraction for many people - I have experienced it many times. It does not have to involve genuine physical attraction at all but it can certainly feel very similar. I got confused about relationships like that quite a few times in my life and even acted out in ways that I really regretted later. It took me quite a bit of experience to recognize it for what it is and keep it that way, also not to verbalize it, but the feelings can still be the same: very pleasant and energizing. I imagine that many therapists experience similar with clients they like to work with and find it stimulating. It a quite distinct situation from real sexual/romantic attraction but transference can feel very similar in my experience.