toffeellen, I think it is cool you have lucid dreams. I have heard that people can train themselves to do that.

I'm not quite sure what your T meant by concrete thinking either. Your T says you don't do it? I know what abstract reasoning is, and maybe it is the opposite of that? I know that in children, they are unable to think abstractly until a certain age, and then begin to gain that ability, I think around age 10-12, some earlier than others. This ability continues to develop through adolescence. Even in some adults, abstract reasoning is not well developed. So perhaps your T was complementing you on your abstract thinking abilities when he says you are not a concrete thinker!

I hope you will be able to forge a trusting relationship with your T. It takes time. How long have you been with him? If you feel unsure and insecure about his direction in therapy, can you ask?