“In AP Bio, I learned that the cells in our body are replaced every seven years, which means that one day I'll have a body full of cells that were never sick. But it also means that the parts of me that knew and loved Sadie will disappear. I'll still remember loving her, but it'll be a different me who loved her. And maybe this is how we move on. We grow new cells to replace the grieving ones, diluting our pain until it loses potency.”