A self-debilitating virus, that infects the mind from the inside. Effects can be contagious for mentally entwined third parties.
There are times when you know why you need to be alone, not for a short while but for the majority of your life. It’s not just the perception of others not seeing your way, the rights or wrongs, or placing the blame. Interaction is just too complex for certain people to deal with, which is why they remain lonely, occasionally dipping the head under the clouds for a small taste of convergence, until the moment when interaction asks to cease and they head back home, alone.