Mariage gives a number of social advantages because it's a proof that the people involved share their life in a lasting manner (yeah right), and I don't see why those advantages couldn't be granted to other sorts of couples who want to share their life.
If I struggled to the end of my determination, to the end of my way of life with my followers, if the result is ruin, then this ruin is inevitable. Grieve. Shed tears. But you cannot regret.