My current therapist seems to think using a workbook and checking in every six weeks is sufficient, but I remain skeptical whether this qualifies as therapy. 

I realize the goal of DBT/CBT and much of therapy is to get you to do the heavy lifting, but I worry I am getting poor treatment compared to the standards set by Marsha Linehan. I also don’t want the therapist to drop me on a whim because “I’m difficult/non-compliant”, and be put on a waitlist.

Have people here made sustained progress alone with reading and exercises, or do I have a valid concern?