It's not silly at all, S. This was your home, your children's home. This was part of a dream. Of course you are going to feel sad about it. Nothing wrong with that.
They often pull back when going through something like this. While he thinks it's what he wants, there are other things he is feeling.
So, what can you do to stop wanting to look at your phone. Is there a project you can start? A friend or family you can call? Can you write in a journal? Snap a rubberband on your wrist?
This is tough stuff, Shining. No way around that. Tough, sad stuff.
But you will feel better as you travel this. You are already getting stronger...:)