But you are to be perfect, even as your Father in heaven is perfect. (Matthew 5:48)
You know that you are far from perfect. Perfection doesn’t have to be the end goal, but rather a path in the right direction. Are you heading in the right direction? Perfection might be to love someone who has harmed you in the past. That may be a difficult and seemingly impossible thing to do, but have you thought about simply sending them a pleasant card or gift? The important point is to strive to be more God-Like by moving in the right direction. Allow God to lead you by his spirit and you will be able to conquer the impossible!