I say start moving stuff around, start filling the gaps. I did when my wife took things and it made me feel good. I also early on removed all of our pictures together, I did not need those staring at me, it did not help me focus on what I needed to focus on.

TBH, I have our house looking better than ever! I hung up new artwork, rearranged the furting, hung curtains, etc. It made me feel good. Create a comfortable sorrounding for yourself. Blank walls and spots pictures or furniture used to be will only remind you of things that won't be productive in achieving your goal.

BITS

Happiness is not something ready made. It comes from your own actions.