You must do it ALL of the time! It will eliminate a lot of drama from your life. You teach other people exactly how they can treat you! In your relationships the most appropriate way to handle things is by nipping things in the bud. This means putting a stop to things immediately! Another chance is another opportunity you give someone to do you any way they want to. That's unacceptable! You shouldn't be afraid, have to walk on eggshells or have to tiptoe around in your relationship.