My parents were married for just shy of 64 years before my dad passed, and were sweethearts for slightly over 70 years. Mom always said "divorce never, murder maybe" My wife and I just celebrated 29 years of marriage, she takes a slightly different angle to Mom's philosophy: "divorce never, murder, not yet". Her parents were married just under 60 years before her mom passed.
I cannot imagine not being married. There is no her's and mine, unless you're talking about basically underwear, shoes, what little make up she uses, oh and, her sewing machine for quilting. Mess with it and "not yet" changes to "just did".