People who have lost relationships often wonder why they can't just let it be "water under the bridge." It is water under the bridge - the trouble is we do not live on the bridge but in the river of life with its many twists and turns.
One of the greatest titles we can have is "old friend". We never appreciate how important old friends are until we are older. The problem is we need to start our old friendships when we are young. We then have to nurture and grow those friendships over our middle age when a busy life and changing geographies can cause us to neglect those friends. Today is the day to invest in those people we hope will call us 'old friend" in the years to come.