Yes, my therapist has said that he missed me. I absolutely believe him. I think you are right when you say that it is not the same kind of "missing" that you may feel, BUT, it is likely that she saw something that reminded her of you, or that she was just thinking about you.

I absolutely believe they do that. Of course, there is also that element of designated shared time. That's a powerful thing for both of you, especially if you've been with this therapist for some period of time. It's an element of routine, and very likely a pleasant one at that.

And, even if she is just saying it to make you feel better, what does that say to you? That she cares enough to think about you, provide for you and thinks enough of your well-being to help.

Nothing about that says disingenuous to me.