Maybe it's learning towards "finality" or an official ending, maybe it isn't. We really don't know. The benefits you outlined of it being yours alone might help to alleviate some of the tensions, because your lives would be more separate for sure. Perhaps removing tension is a good thing.
You are comfortable in this limbo, but it's not the only way to be comfortable. There are other ways you just haven't experienced yet. That's my takeaway from my own sitch - try your darndest to not fear the unknown. It's not necessarily bad or even worse - it's just different. And the fear is entirely based on it being unknown. We are afraid of making a wrong move. But you're not making a wrong move - you're just making a move. No adjectives attached.
The girls may love the house, but they can love more than one thing. We all can love more than one thing. We are not limited in our love. You may need to spin it as a "great new opportunity" for a while, but they will settle.
I'd say you should write out all of the potential positives that could come out of a move. Just to remove the fear. Look for where opportunities might be hiding, and see if that can inspire some excitement in you.
