Relationships are hard work, but how hard should they be? When do you know you are struggling too hard to keep the relationship going? Personal relationships, like business relationships, are deals. In business, a deal breaker is the nonnegotiable term that, if not agreed to, means the deal is off. In a personal relationship, identifying your deal breaker can be much more promising as it holds out the possibility of helping you understand where the relationship has gone wrong, what needs to be done in order to make it better, and when to walk away.