Boundaries are sort of an imaginary line between you and others. It divides up what’s yours and somebody else’s, and that applies not only to your body, money, and belongings, but also to your feelings, thoughts and needs. That’s especially where codependents get into trouble. They have blurry or weak boundaries. They feel responsible for other people’s feelings and problems or blame their own on someone else.
Some codependents have rigid boundaries. They are closed off and withdrawn, making it hard for other people to get close to them. Sometimes, people flip back and forth between having weak boundaries and having rigid ones.