Sounds like things are going well, I'm glad. I think I'm in a very similiar situation other than my mind is thinking about the sitch and W much more. I can completely understand with your circumstances how I would be putting it in the back of my mind also. Never know what the future holds for either of us.
I feel the same about living alone. Other than a short period of time while in the military and living in the barracks away from her, I've never lived fully alone with all the responsibilities attached before. It's so much work with very little down time but liberating at the same time. With how much my W is working, 50-70 hours a week, I end up with maybe 1 or 2 afternoons to myself after work but it's good. Playing the mom and dad role at the same time can be challenging but I can't complain having my kids this much a week. It's definitely a new challenge where we can grow as individuals.
Accept what is, let go of what was, and have faith in what will be