MUE- I agree with Sunrise. I always had to process very painful things at least some in individual before I brought it up in group. You really cant delve deeply into things in group in the same way you can in individual. I think it has to do with having your therapists undivided attention and feeling safe. My t at the time always encourraged me to do some work first with him, then bring things up in grp. As a matter of fact, when there was SO much turmoil, I took a breaks from grp as I remember.
Maybe the next session could be about what might be holding you back. There could be a lot more there than just resisting or letting go of what you might be holding on to.