My first time through therapy, I ended up just enraged at my therapist. My life just kept getting worse, it seemed like, and all he did was sit there and take notes or ask me question. I got so angry about those unending questions and he would never ANSWER my questions. He had NO ANSWERS. So, one day when he asked me how I was and I said 'fine,' I finally stopped and just said I wasn't fine and I was sick of therapy and I was sick of his questions, and I was sick of the fact that he never really responded to anything I said and I was left to try to interpret his facial expressions and occasional twitches and I just WANTED ANSWERS! He made a joke about having all the answers, but keeping them locked in the cupboard and not sharing. I was like and finally started laughing. He asked what he could do to make the therapy experience easier for me and I told him I needed feedback. I wanted and needed him to tell what the half-smile meant. I wanted him to actually respond and tell me what he thought and not leave me to guess. We reached an agreement whereby he would try to tell me what he was thinking, but that I would ask what he was thinking if it was bothering me. It worked out really well.

So, maybe you can just tell your T that you are wondering what those expressions mean. Stop and ask him what he's thinking WHILE he's doing it. If you wait until later, he may not remember.