If letting go, if letting people and things work themselves out in the way that they needed to without your help was the most important thing, then it was also the hardest.
A person could leave you so quickly. So much history and time and memories, but they snuck away from you, and other things took their place. How could you hold on? Wait. A bigger question. The biggest. How could you hold on and let go?
Darkness does this. It finds all the places you are hiding in. It finds all the things you are holding onto tightly and makes you let go.