I am so happy I came across this post just now. I have been seeing a therapist for a year and a half or so now, and haven't broached the topic at all. Actually, my seeing him hadn't had anything to do with gender issues, or so I thought/told myself. It had been in the back of my mind, and I think it's been holding me back more than I knew---I couldn't be open because *gasp* what if I accidentally told him about that?
I think tomorrow will be the day. I'm taking these feelings seriously for the first time in my life, so I think I have to. He's not a gender specialist, and I really don't know how he'll react. I don't think I've telegraphed anything at all. But what's the point in talking to him if I don't open up, right?
Glad you were able to take that step, and I hope I can be as strong.