Ability to manage the three dimensions of one's psychological boundaries (permeability, flexibility and complexity) in relationships with other people.
"She doesn't know where she ends and I begin, psychologically speaking, because she has no boundary intelligence."
a person who walks all over you with the excuse of "I'm just trying to help"
My mother does not trust me to live my life; she boundary stomping every decision I make, and then tells me she was trying to help an make mefeel guilty