This is such a good question, and I'm not sure the answer is at all simple. Because it's not just you and your T in a room and you having feelings for her, as other stuff comes into play like transference. So there are the questions of a) what you feel and b) who you really feel it for.

Personally, I feel quite similar about my T, but I don't think it's attraction because I don't have those thoughts or feelings about him. I tried once, idly, to have a thought like that about him, and it was totally, utterly blocked in my mind. I literally couldn't picture it.

I think it's worth realising that, as and when you're ready to stop therapy, you will be able to provide something internally that you're getting from your T right now. I honestly think this is all part of a healthy attachment, including wanting to get a hold on her image - kind of like building up a resource to get you through the week.