Although I did not find transferences healing, it sounds as if you have. And so maybe it is a sign of your "development" that you are having this erotic transference now. I view Freud's idea of the oedipus or electra complexes as just something that would normally happen for kids when those pathways in the psyche started working and eventually get integrated (in the ideal case, of course). If yours got "stuck" then it could be healing, too, for this to work its way out now.

I don't know that you need to discuss it with the T, unless you want to. Nothing wrong with the feelings per se except, as you say, you don't want to sexualize a father figure. Except that all children may do that somewhat, for the sake of their own development, even if there are all kinds of prohibitions against it, which is probably OK, too. It can live in a fantasy life, briefly, while the neurons work out the pathways, even though it's not a part (hopefully!!) of the child's real life. Seems like that might be true in your situation, too.