So you're married, unhappy, things not working out? Everybody here is taking the traditional marriage as a given, its not. Marriage is a contract between 2 adults therefore they can work out the terms of that contract for themselves. Official sanction is merely a way to control and regulate society, you want to control an entire society? Easy, control the means of reproduction. Make it necessary to get official sanction. All the BS about relationships is predominantly an inheritance from patriarchal medieval society, the knight in shining armour syndrome. Be honest with each other and say what you want and what you feel. Decide for yourselves what kind of relationships you want to have and don't fall into the trap of merely accepting somebody else's idea of what a relationship should be.
This above all: to thine own self be true, And it must follow as the night the day Thou canst not then be false to any man.