Each person must decide where they draw the line between preserving their privacy, at least from those with whom they are not intimate, and letting others in. To maintain those lines, they erect boundaries and work to preserve them. Some individuals are more vigilant, and even aggressive, about their firewalls, which can lead to discomfort, if not conflict, with others. But in general, setting healthy boundaries can be a way of preserving one's mental health and well-being.
