No one is perfect. You are only human, and mistakes are going to happen. Instead of beating yourself up over small mistakes, try to forgive yourself, and move on.  Of course, if you make a really big mistake, you have to take a step back and do some self-reflection. Certain mistakes are so huge, it might take years to heal and forgive ourselves. If you feel that regret about the past is holding you back from being happy, consider seeing professional help.