Letting go is trusting that God has a plan & purpose. You may not see or understand it yet but in time you will. You don't want to hold on to bitterness, you need to forgive and move on. God has the perfect someone for your life, you need to trust Him even in the difficult times and praise him through the heartache. It's not easy, believe me, but I know there is a reason behind what God allows us to go through.