I think sometimes we get so focused on trying to verbalize and explain and analyze everything in therapy. I sometimes worry that I haven't adequately expressed how grateful I am for the things my T has done for me. But then I look at our interactions and realize... she knows that I am grateful... and attached in my own weird kind of way. Not everything needs to be directly and explicitly expressed in word. You likely have communicated your appreciation via body language, through your willingness to collaborate with her, and your repeated efforts to connect and let her into your little world.