Believe it or not, it does get easier.
My marriage of 16 years ended badly last August when I left after many things went horribly wrong. I am happy to say that we were able to put the needs of our daughter first, and are doing quite well as co-parents.
The wounds are healing but songs, possessions, pictures, and places all sting when encountered.
Plus we have a daughter who REALLY wants her parents back together. It's tough!
But we are both managing to move on. It's a bizarre set of circumstances and we are handling it our own way...and I think we are doing ok but there are times when we both are angry, sad, happy...we have lots of memories, pictures, videos, songs, people, places, events...all things to work thru.
Time...it's just gonna take time.