Bring back the lightheartedness, the laughter, the rush of romance, the sensation of feeling in love.
If you have banned that from your marriage, if you evolved through a business-like partnership into dwelling on faults, you are in danger. It is hard for any marriage to survive where love has turned to bitterness and anger.
Without the delicacy and delight, with difficulty a marriage may survive. But where love is renewed and refreshed with romance, it may grow through the years.
Make love, not war.