I read your S.O.S., you will be OK!! If not today, tomorrow.
I did exactly the same as you after the move - saw the empty places and filled them where I could. But not more than needed. Let me explain - I decided to do without some of the changes to remind me of my H, what happened and what needs to change? I was too afraid of glossing over the sitch, not dealing with the pain, and falling into the trap of remembering all the good times. I also, packed away the photos of the wedding and honeymoon so I wouldn't be tempted - I have to go to a lot of trouble to find them now - and that is reality. I did go out an buy something big that I needed (this computer)which gave me a way to journal and focus and distract me. I spent days looking things up that I never knew existed. I discovered people in the world who asked the same weird questions and looked up the same weird info. But I also found this site and it has helped me a lot. I also changed up some of my routines to avoid missing H presence and that included some of the favorite foods and restaurants. One thing I noticed changed right away was the disappearance of tension and stress. My kids started talking to me all the time like they used to do and I heard laughing again.
One comment about your D's view of things - kids don't understand the things adults understand. They are all over the place with emotions and changeable. Focus on your M with your H or adult friends and not worry about them. My D before the move out admitted she was planning to leave - she didn't understand why I thought I needed a man to be happy. After the move out - she came to me and apologized for not being supportive enough for the two of us and praying for us. She stays out of R now and just supports whatever I say or do. Think about it when the time comes.