Bright, I think he was looking around the home to see if anything had changed, maybe you took things down or moved them around...but also to see if there where any "new" pictures that you may have added. He may have been curious to see if there would be a picture of someone new in your life. They like to look around because it is a safe place and they want to make sure that everything is left the way it was when they were there.
Oh, I have a feeling he knows about the conversation and he was chatting away to see if you would say something about it. If he wasn't told, then he sensed a shift in you and wanted to see if you would open up and tell him that you want separation. Keep in mind, many of them don't file because they don't want to look like the bad guy. Again, I am only basing my posting on what you've posted.
He still considers your home his base and he will continue to rely on you and leave things there because he knows that they are safe there and you won't do anything w/them, i.e., like pack them up and take them to his brother's place or toss them out. He knows you very well and is quite comfortable w/things staying the way they are for now.
Bright, I do not think you were wrong about him. However, the crisis does change them a lot while exploring the world. You can't expect him to be the same old h when he's in crisis. They become someone totally different in just about every area of their lives. Unfortunately, no one knows how they will come out of the oven after they are baked.
So, what's on your agenda for New Year's? Got any plans?
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.