Yes, every doctor, therapist, friend, parent, mentor, and person will make mistakes. It will happen. Your choice is to either avoid all people and relationships and be miserable and alone all the time. Or you can engage in relationships, knowing that sometimes they will hurt. And you will be miserable and in pain some of the time. Which would you prefer? All the time guaranteed misery and pain? Or some of the time pain with many great moments in between the painful moments?