Marriage is a symbol of love between two people. It symbolizes that two people have dedicated the rest of their natural lives to loving another person unconditionally. Unfortunately, someone at some point further defined marriage as an official union between a man and a woman.
The concept is now so outrageous that the popular culture follows the antics of celebrities that actively engage in cycles of marriage and divorce. People are somehow amazed with this. This is a problem because it creates a privilege out of something that used to only be made of love.
I strongly encourage that people admit to their mistakes, especially when it comes to marriage. Sometimes a married couple just does not turn out the way it "should" have. That is ok. Get a divorce and move on.
Marriage should not be political, or public. It should be a special connection between two people, regardless of who those people are.