MissCharlotte, it's OK to miss your T.

It doesn't mean you're ungrateful for what you have, just that you want to have T in your life too.
When T was doing weekly couples sessions with my H and me, I still went to see him every other week alone. That was so important. I needed that extra care and support especially during the tense time of doing couples work. Sometimes seeing T together with my H was worse than not seeing T at all. There are times one can feel abandoned in couples therapy. And sometimes I felt another layer between me and T. I remember times T tried to connect with me in couples, and I wasn't very receptive. I kind of felt like, hey, don't try that with my H present! That's private, that's our way of being and not something I want to do with an onlooker!
I am glad you are surrounded by four people who love you.
Good news about your surgery. I hope you have a swift recuperation.