I have felt sad, yes.
I am one who has become content to have my T as my T, though, and feel like we have an amazing relationship and strong rapport in that context. I would rather have her as my T than my friend and even though the relationship has what feels like an odd nature at times or boundaries that hurt, I still want it to be as it is and am thankful for a relationship where I am so free to be me and tell all my pain and still be so cared for and helped.