I'm really sorry to hear this. I hope your situation turns out far better than mine. The only thing I can offer is to keep communications open. My ex SO (typing that feels so weird) didn't even hint that he'd changed his mind about living together until the final decision had been settled on in his head. The move would have affected both of us, but we weren't both part of the decision making process. I was left out. Make sure you guys talk to each other about all possible plans to consider - present and future - and any worries you might have, that way one of you won't add on worry after worry after worry until something happens.

You can do this. Keep your head up and stay positive. :)