Frantic efforts to avoid real or imagined abandonment. Unstable and intense interpersonal relationships. One moment they may idealize their partner, the next, completely devaluate them. Identity is always in question. Unstable self-image and sense of self.
Borderlines have even been know to change their gender in search of self.
At least in two areas and are self damaging. Self-mutilating, gestures, threats and behavior. Severe mood shifts. Depressed and lost one moment and euphoric the next. Chronic feelings of emptiness and boredom.