“We never look back. We just figure there is so much to look forward to that there is no sense thinking of what we might have done. It just doesn’t make any difference. You can only live life forward.” Warren Buffett

Regret is the feeling of disappointment when looking back at what we have done. It does have a piece of self-pity. Also, sadness for what took place. Instead of seeing experiences as just experiences to be lived. Try learning the lessons that experience teach rather than looking back and obsessively contemplating what could have been.
So as you think about your life right now–If you had your life to live over again…what would you do differently?

As I reflect on this life of no regrets I remember a wonderful though by Reinhold Niebuhr in his book The Irony of American History (1952): 

“Nothing that is worth doing can be achieved in our lifetime;
Therefore, we must be saved by HOPE.
Nothing which is true, or beautiful, or good, makes complete sense in any immediate context of history;
Therefore, we must be saved by FAITH.
Nothing we do, however virtuous, could be accomplished alone;
Therefore, we must be saved by LOVE.
No virtuous act is quite as virtuous from the standpoint of our friend or foe as it is from our own standpoint;
Therefore, we must be saved by the final form of love, which is FORGIVENESS. “

-Reinhold Niebuhr