The other way for you to know he picked YOU and not the house is to move out but NOT buy another house. I understand your desire not to move multiple times, I get that you really dislike it. But, the real issue is: is your discomfort at potentially moving multiple times if necessary greater than your desire to do everything in your power to reconcile? To me, that what it sounds like you're saying. You'll move out but if you do, you're going to do it your way which doesn't leave much room for him if he wants to come back and might be exactly what he's expecting.
When my W walked away, one of the first things she started telling me about was the houses she was looking at buying and I know how that felt to me. It's so much more of a definitive statement than simply moving out.
OK, I've said way more than simply my $.02. Good luck with whatever decision you make.
Me: 32 in OH Wife: 29 in MD Married: 4 years No kids Seperated 14 months
