Paige Williams, writing at Oprah, talks about clean breaks very frankly. Here’s a snippet from the article I found:
Remaining attached to some people is like slaving over a withered garden without realizing all the plants are dead. And letting the negative relationships suck up time and energy only deprives us of the opportunity to nurture and appreciate those friendships that actually do work.
Here is the whole story.
https://www.oprah.com/relationships/frenemies-drama-queens-attention-addicts-relentless-pessimists_3
Discussing friendship, in The Mirror | ‘Clean Breaks’.