Yup, talking with T about not wanting to go or address difficult topics can be very helpful. Two specific things that have made a difference for me:

1. I talked about my strong desire to avoid difficult topics, and frustration about spending time and money to just talk 'fluff' I asked T to help me talk about 'difficult things' for at least five minutes each session. This really helped- More often than not, I'd then be able to push myself enough to talk MUCH more than 5 minutes. And what was really interesting was that b sometimes, when I felt that I hadn't talked about anything particularily important, T would say "wow, that was worth at least 5 minutes, maybe ten!" I'd ask why, and we would talk about that. It really helped with focusing in on things I wouldn't have otherwise.
when I was really avoiding stuff, T would say, "okay, how about our five minutes?"

2. I had been going through a rough patch being highly ambivalent- a number of sessions where I felt all I could do was talk about wanting to talk/ not wanting to be there. Someone on PC talked about 'quitting therapy between sessions' (I wish I remember who) some weeks I walked out of there thinking to myself- "well, I'm NOT doing this again until next week" Seems kind of silly, but it was helpful.