FS, I find your H's behavior around the house interesting as well. I agree with your thoughts on waiting to speak with him until after your trip. This will allow you to A) Observe additional behavior on his part and B) Remove yourself from your daily life a bit, and approach this topic calmly
Do you think he just wants to be in a familiar space? Perhaps he is trying it on like an old coat - seeing how it feels. He has his own emotions to process as well, and I wonder if being in the house helps him with processing. Assuming he really isn't doing anything negative, this is a strange conversation to have with him.
