Trying to be the 'right' one in a relationship will get you in trouble. It's better for two to be in harmony than for one person to be right. Being 'right' is not a valid side, it's pride!
Instead of saying "Blessed of those who are right," Jesus said "Blessed are the peacemakers."
The Bible teaches that only God, the all-knowing divine Mind, knows what's right, never a human personality. And that's the attitude that brings healing. Our power to argue a side is not divine, but our ability to drop human opinions and yield to the fact that God is governing and guiding all is the path of wisdom. (God is never a source of division or conflict, but is always supplying spiritual thoughts that lead to harmonious solutions).
Let's be an active peacemaker and listen to God for our words and actions. Instead of righteous thinking, a humble, what-can-I-do-to-help?, servant-attitude is what makes relationships blossom with lastly love and peace.