I think it is very common to feel the way you do, I have read about it a few times on here (I think there is even a subforum in the therapy section here). It's understandable someone who is giving you undivided attention and listening to you with empathy suddenly feels attractive to you, especially if they are the gender you are attracted to.

He gave you the only response he could, he reassured you were attractive but reminded you that was not the purpose of your therapeutic relationship.

It might be that your attraction to him might reveal some useful things about yourself and could actually help you understand yourself better. In that way, if you can continue with your therapy with him, it could be a positive thing possibly. But if it is too painful maybe you might want to get another T, possibly a woman.