My t is forever telling me (every time I have the need to discuss the relationship, because I struggled with the weirdness of it for so long) that "It's a unique relationship." And it is, and I think that it's not only unique for the client, but for the t, too. Every single therapeutic relationship is unique unto itself as well as overall it being a unique relationship between t and client. My brain is foggy this early in the morning so I may not be making sense. So I've got it in my mind anyway that when at whatever point my t and I say goodbye, she may not miss me in my traditional sense of missing someone, like in the same way that I will miss her, but I do think that she will remember our work together fondly. They've had training which I would imagine learns them how to handle feelings about clients like these. So my very long convoluted answer shortened up is that I agree with atat, him mentioning traits about you that he will miss says to me that he appreciates the person that you are, and to me is more specific than just a blanket "I'll miss you".

Sending you hugs and good thoughts as you go through this transition.