Regret

     Is regret the best reaction to something you did in the past?  Are you being disloyal and casting a shadow over your former self because of something you did or didn't do?
     Perhaps you or someone else suffered unpleasant consequences of your past decisions or actions.  Perhaps the person you are now with added experience and wisdom would make a different decision.  They say hindsight is 20/20; a better viewpoint now than in the past.  Many people think, "If only I had _____, things would be different or better."  This wishful thinking is a useless waste of time.
     Many religions want you to focus on past sins and be repentant.  Some people need a god to forgive them; some learn to forgive themselves.  Better yet, just realize you may have made mistakes, but at the time you had your reasons.  Perhaps you will do it differently in the future.
     What's done is done. We can't change the past or make up for history.  Negative emotions and apologies will not erase or negate the past.
     Now is now.  Accept your personal history as stepping stones toward tomorrow.  The path is never perfect.  You may have slipped along the way, but you made it to today.  Don't regret it.