I've been in a similar situation. My last T had crossed boundaries with me in the similar fashion though not quite the same. I understand your dilemma and the reason why you are unable to leave at the moment, as I had the same dilemma and had been stuck in the similarly unhealthy situation for a long time for the same reasons you are stuck now. What I can tell from my experience is that these things only get worse as time goes by. This is a potentially very harmful situation and you can end up getting hurt very badly. This is important to keep in mind, no matter what decision you make.

If you understand that this is an unhealthy situation, but, at the same time you are unwilling to leave because you've become too attached to the guy and because a personal connection with him is so important to you that you don't want to lose it, then you've already made your choice to stay, at least at this time. That's fine. If you are inclined to stay then you need to stay for as long as you need it. In retrospect, I can say that we get stuck in certain situations because the situation is still serving us in some way no matter how unhealthy or damaging it can be. We leave the situation immediately as soon as it stops serving us or when it becomes crystal clear that is has never served us.