Hey,
so I read your whole post and I really want to be of help, but unfortunately I'm in a really similar situation, so I don't know how to respond. I WILL say that you're not alone with these feelings...sometimes a piece of me legitimately HATES my T with a passion and I start getting horrible images in my head that I know aren't good for me. Other times I get images in my head that make me scared of my T...and other times there is that piece of me that REALLY wants her to NOT sit soooooo far away. And there are times when a piece of me wants so desperately to hug her cuz she makes us feel soooooooooooo nice inside!
It's important to remind all the pieces of yourself that those feelings are valid. Try to remember that even though there are certain things your T can't do for you(or certain things your T may stop doing when he/she realizes it is not professionally appropriate), it doesn't change the fact that they care. Try to think of all the times in your life when someone who you thought really cared overstepped those boundaries, and how hurt you felt when they did. I don't think your T wants to mimic that interaction, because then pieces of you would start to not be trusting.
I hope this helped...like I said I feel the same way sometimes. It's really hard to know the healthy boundaries in any relationship when healthy relationship boundaries have never been modeled very well. For me, long term relationships have never been modeled well at all, so it's hard for me to not want to just change Ts all the time. I feel like if I don't let the relationship last too long, there won't be any time to get hurt. For me, having all the individual children move past those feelings will take time. So give yourself time, even though that may not be something you are used to...