Move on from what? Relationship? Betrayal? Accident? Some things are easier than others, time always plays a part. Being able to talk it over with friends/family/therapist. You do what you can to let go of the pain and get on with your life, never easy.
Things happen in life we do not like and enjoy i.e. life is hard.
Some things we never get over them these are the difficult ones...the trick and key is to get past them...when we remember them person/place/event/thing acknowledge this as something that did happen and decide how is the past going to effect me here right now in this moment ????
Look at a successful person and you'll see someone who has been knocked on their bottocks numerous times in life..has taken the event and turned it into a positive character building experience.