Are you down and feeling resentful for what you have done in the past? We as individuals must have felt this way times and times as we grow older in life.
Bad news is that you were responsible for your past. Good news is that you are responsible for your future. So, instead of focusing solely and feeling resent about the past, you should focus on your future.
The past has been written and mistakes have been made in it. But the future is still unwritten and there's a chance for you to make corrections of the mistakes you made in the past.
There's always that opportunity to make things right, but you mustn't remain the the past, feeling regret.