Check your spiritual connection.
It might seem like an obvious thing to say, but in the middle of a an argument who really wants to go to God?
Do it anyways.
You love your husband/wife, you know you do - so start acting like it!
God is love. Bring Him into your marriage & see how He works, see how Love really works!
1 Corinthians 13:4-7
Love never gives up.
Love cares more for others than for self.