And though we prepare for losses in love, the end of a friendship always takes us by surprise. Often people just drift apart, but if there's a serious conflict, people take a more active role in ending it. Friendships wax and wane. Sometimes you feel close, other times less close. But there's no social framework to sustain a friendship that gets into trouble.
People start to build a case against the friendship.
Nothing forces you to try to keep it together. In fact, nothing holds relationships together but two people's goodwill, and that is often not enough.