“Defriending isn’t just unrecognized by some social oversight; it’s protected by its own protocol, a code of silence. Demanding an explanation wouldn’t just be undignified; it would violate the whole tacit contract on which friendship is founded. The same thing that makes friendship so valuable is what makes it so tenuous: it is purely voluntary. You enter into it freely, without the imperatives of biology or the agenda of desire. Officially, you owe each other nothing.”