If a person has poor boundaries, they will eventually betray you. Because people without boundaries essentially lack a sense of proportion. They can easily cross others' limits today, and tomorrow they will cross yours as well. A truly reliable person may not be very enthusiastic, but they definitely understand how to respect the distance between people; and those who are accustomed to infringing on boundaries often prioritize emotions, desires, and interests over relationships. Therefore, betrayal is often not sudden, but begins with repeated instances of "lack of boundaries."