"Want" him to? I don't think that was that important to me. I assumed he did from time to time in passing. I mean, I think about various students even when they're not in front of my nose and I have a whole lot more students than my therapist had clients and know them a lot less intimately. In fact, I was always a bit taken aback when he mentioned having thought about me (which he did from time to time). It was nice to hear I guess, but still surprised me somewhat that his thoughts about me were important enough to him that he mentioned them in session. In other words, they weren't just passing thoughts, but rather, more involved, deeper thinking kind of thoughts.