I have always been struck by the scarcity of material that circulate on the topic of female relationships. I say this in the context of today's bottomless internet stock of think pieces, articles, listicles and advice columns: What proportion of them revolve around the theme of romantic heartbreak, and how many focus on another kind of break up, that of a friendship, that might involve fewer tears and less longing--but just as much, if not more, cutting pain?