Question: borderline personality disorder how to know?
Answer: Fear of abandonment. People with BPD are often terrified of being abandoned or left alone. ... 
Unstable relationships. ... 
Unclear or shifting self-image. ... 
Impulsive, self-destructive behaviors. ... 
Self-harm. ... 
Extreme emotional swings. ... 
Chronic feelings of emptiness. ... 
Explosive anger.