The fourth chakra is located in the heart. It deals with love, and is blocked by grief. Lay all your grief out in front of you. You have indeed felt a great loss. But love is a form of energy, and it swirls all around us.The Air Nomads love for you has not left this world. It is still inside of your heart, and is reborn in the form of new love. Let the pain flow away.
Cutting off hair in ancient Asia (Japan, china, Korea & possibly some other Asian cultures) symbolizes being banished or rejected from their home. In the more modern age that is now, cutting long hair into a short cut means to forget the past, leaving the old and starting anew.