Never for a moment be with someone you no longer want to be with.  But never for a moment use sharp words to mock them or belittle them to create distance.  There’s never an excuse to be purposely hurtful, to anyone, ever.  Also, never think that anyone you are talking to is not telling others (their version of ) what you said, whether anyone wants to hear it or not.  Friends don’t do that and, if they do, they are not your friends.