I think a lot of this stuff is an issue if there are young children involved that still require support. I was married just over 29 years at the time of our divorce. In our early years we worked together to make ends meet and slowly increase our standard of living. During our marriage she managed to secure her Masters Degree in Nursing and Her masters degree in gerontology. Her ability to earn a living, education wise, far exceeded mine. Due to that situation after all those years of struggle, she decided that she no longer wanted to be married as I was "dragging her down" and I was apparently to controlling so without even a goodbye she moved out while I was at work. She took very little and asked for nothing initially. Our children were grown and married by then in fact the youngest got married just three months before she left.
Now another part of the backstory, she also had a progressive mental illness that caused her to be strongly paranoid, angry and depressed. She did not process abstract thought very well and was as literal as anyone I have ever met. There were warning signs of that before we got married, but, I was to smitten to notice them at the time. However, the sure came back to bite me later in the relationship. By the time she left, I was numb to anything that she came up with, but, I did know that she crossed that line where I could just forgive and forget. I also wanted out, so I did not contest the divorce or even attempt to fix it. The days of trying to fix were over.
Since we had a family and by then grandchildren we were occasionally at the homes of our kids at the same time. We were friendly toward each other, but, it was cold and very uncomfortable. I will admit to being hurt, but, I honestly came out better in it then she did. Because of her illness she could not keep a job and what little money we split up when we sold the house (after paying off all the debt) was gone quickly. While she was in school before the divorce her father passed away and left her 80K that she spent pursuing her Doctorate in Gerontology and also borrowed an additional 30K in student loans. She wanted them to be joint loans, but, I refused and even though they tried to get me to pay it off, it didn't happen.
I don't regret our marriage because I have two wonderful daughters and 4 equally wonderful grandkids that I love dearly and spend as much time with as I can without being underfoot. We had many years together before her problems started to take it's toll. She passed away in 2016 broke and basically supported by the state. I paid for her burial plot and split the cost of the head stone with my kids. Many time I was asked why after being divorced by her over 15 years before her death all I could do is say... We had many happy times and we jointly raised a great family and she was my wife and I, her husband for 29 years and I wanted to know that she was taken care of. She didn't ask for the illness that forced the separation of her and her family, but, I don't ever want it forgotten that she existed and was at least half responsible for the fine family that I have supporting me and keeping me from being alone. Nothing will take those good times away and I don't want them to be taken away so let's just call it payback.
Why did I tell you this story. I told it because there is way to much hate in this world and country today and we need to take inventory on what and who was a part of the life we have now. I was lucky that I was able to pull myself up and continue to survive. She was not, but, I would never want it to be like she never existed. She did exist and because of that there will be a continuing line of humans that will affect the world, hopefully, in a positive way. That's not to mention the years she spent as a Registered Nurse and helped keep many people alive. I hate mental illness as much as some people hate cancer. It deprived the two of us a life together to the end and I think there is a good chance she would be alive today, had it not been for that illness. So living together or marriage, nothing is ever promised to be forever. Some will survive until death do us part, others will not whether we took the public vows or we didn't. Love isn't defined by a piece of paper, it comes from some internal source that hopefully goes on for a lifetime.