When something from your therapist's personal life comes into the room, how do you respond? Like you would to any other person? Or do you just ignore it?

It's become apparent that he and his partner have broken up. It came up because a few weeks ago he decided to take an extra long trip to his new school which interfered with our sessions. He basically said "I think I'm going through a break up and need to take a few days as a sort of personal retreat". Lately a few other things have slipped out. Nothing huge, just a little bit leaking out, and all of it is in context of what we're discussing. Like when we were discussing setting up a home office for me, he referred to the desk he has at home as just that, where previously he had called it his partner's desk. Then, while discussing ambient noise sleep apps, he mentioned that about a month ago he started letting his dog sleep in the bed with him and how he enjoyed hearing her snore. Today when discussing our remaining sessions, he mentioned he was going to visit family at Christmas because he's doing the pandemic alone.

If this were not a therapy relationship, I'd tell him I'm sorry that his relationship ended and I hope he's doing ok. And I really want to express that to him, but I don't know if I should. I'm not sure if he even knows he's dropping hints like this. It feels weird not feeling ok saying what I would normally say to someone in this instance. What would you guys do?