I've never canceled a session. I've talked to T about my feelings of wanting to cancel or that I should in order to spare him. And when I do that, it is much more difficult when I have to go back and confirm with him, "So, even though I said all that stuff about what I was feeling about coming, do we still have a session?" Last time I did this, he said:
"It [not meeting] was never a serious consideration for me. Of course, if you persisted, eventually I would respect your decision, but I really understand your desperate need to feel safe at times by distancing yourself from threatening feelings. You almost always finish the process (in fairly short order, I might add) by owning the defensive/protective nature of the action. I really am not upset at all by your need to manage overwhelming (initial) feelings/anxieties. It's a safety valve. It is fine..." Then some spiritual stuff that applies to our work together.
Anyway, I didn't know if it would help you to imagine that Ts do understand when we do this. And if your T is upset by it, it's probably because the one you're hurting is you, your own growth, and your own healing. I think my T is so understanding about it for a few reasons:
1. Just who he is as a therapist, very accepting.
2. Because I acknowledge that what I'm doing when I tell him maybe I shouldn't come or should quit or should leave early during a session is a defense, and explore that with him what feelings are triggering my need to do that. So it's actually a point of learning/growth for me, since I follow through the need to hide or run to its source internally, and ultimately, in the past.
3. It's not a pattern for me to act out on these impulses, but rather to talk about them every time they come up. Not saying there's anything wrong with acting on them necessarily, but if it became a pattern with me that I wasn't committed or needed to demonstrate control in that way and was preventing rather than aiding in my moving through these attachment dilemmas, I think my T would probably take a stricter approach with me, for my own good. He would want me to be committed to the process and he has called me out on it when I "run away" within the session without physically leaving, not so much in my dissociation, but other things, like distracting from or avoiding really important issues, arguing semantics or insignificant details rather than focus on the feelings that are coming up...
I am frozen pretty frequently in sessions. I get stuck where the disorganized attachment feels like moving even a millimeter in either direction might kill me. It's hell. Really. I think a lot of people will understand how that feels. The best thing I can recommend to do is say, "I made a commitment to go, so I am going to go." And when you're there if ALL that is coming up is, "I'm so scared to be here with you," then that's all you talk about for as long as it takes, until you get at some of the things behind being afraid to approach. But, you have to actually put it out there for it to work.
As scared as I am to get close, I get more scared to run away, because there were so many people in my life that just went "poof" into nowhere, so it feels like one mistake like that and T could be gone, poof. I don't think he would be, but it feels that way inside. One thing I admire about your T is he has shown there is definitely no poof even when you feel the need to run away, or feel negatively about him. That makes me feel really safe about him even if there are some other areas I might not understand how he works.