Would you tell them how much you loved them? How much they meant to you all of these years? Would you ask them to forgive you for any negative things that may have happened between you, such as mean or indifferent attitudes you may have had towards them; regrets you may have for not always responding to their needs, for neglecting them, or for any other events between them such as lying to them, talking about them behind their back, and even harboring resentment for one reason or another?
One of the great and magical things about the Internet (especially Facebook) is that it has made it possible for folks we have not been in contact for years to reconnect. I personally have reconnected with many old friends and schoolmates I had not spoken to in years. One of these great connections is with a brother-in-law who I had not seen for over 40 years, who I had heard had died in Viet Nam; but he was actually alive and has been living a few miles down the road. I have even connected with former friends, colleagues old military buddies and many relatives I never had the chance to really get to know nor ever spent any time with. Even former high school friends (sweethearts) whom we dated but lost contact along the busy road of this long journey we call life. What a great thrill to reconnect, and to get the chance to say, "How have you been, or at least say I'm sorry we never got the chance to say good-by, and to let them know the special role they played in our life many years ago!"
Cleaning the slate is crucial for many; this is why the 9th step of Alcoholics Anonymous - Make direct amends to such people
wherever possible, except when to do so would injure them or others - is crucial for the healing process to ensue between people.
Nevertheless, 'forgiveness' is still the greatest cure in the world for past pain. However, if no one establishes communication between the alleged victim or the alleged accuser, the pain will last forever for both.