From the boring point of view of an office worker, who worked in a yellow office with furniture that was older than me....
The renovation of my office was a truly appreciated. Ergonomic tables and chairs, new carpet, actual white walls and getting rid of 80% of the old file cabinets make life so much nicer. I put up a union poster, a painting, two plants and i do not miss the yellow plastic stains one bit.
The fact that you don't give in to this, is a great sign of moving on. You're not blinded by desire or false hope. Your brain understands and your heart will follow. It's just a little more inert.
The biggest cry I had after a breakup was a month after I she left me. I was walking home at night and something reminded me of us walking the same way and I just stopped and cried sitting on a wall for 30 minutes or so. It hurt so much but now I know, that this was pure catharsis. I've tried to fight the sadness, "get over it", move on, not feel bad anymore. But what I needed was to bawl my eyes out until they burnt with snot spread all over my jacket. And when I was done I was okay.
Embrace it. You're alive and you loved and this what you get for that. It will pass, no matter what you do, but until then it's yours.
The only real advice i got is to listen to your favorite sad songs a lot and to take an hour long shower until your brain had dissolved in the mist and your skin is almost peeling off.