One of my books said divorce is one solution to marriage problems, but not always the best one. Divorces are expensive in money and to the self-esteem of those involved.
I once saw an advertisement that said trees are a renewable resource. Marriages are also renewable, at least much of the time. Small gestures of kindness can often make a big difference. One study found sample couples who contemplated divorce, but did not end their marriages, discovered that after five years those marriages were better than ever. (Mention of that study comes in a link to an article later in this Instructable.)
The photo is of my parents on their 40th anniversary. By their 50th my father was suffering with Alzheimer's. My mother died in the year of their 60th anniversary. My father had died two years earlier.