This observation involves my bi-polarized friend that was formally diagnosed professionally (by a doctor) as bipolar. It is a one-sided friendship. I am treated as the enemy, a scape goat, and taken for granted if I allow it. It is no ordinary relationship: A mother, daughter situation. I’m the mother watching my daughter being an enemy to herself.
The ideal role according to my own insight is to be a friendly bystander. Advice has not helped. Sneaky reverse psychology might work. However, all advice is unwelcome and is best avoided.
Every bipolar situation is as different as individuals. Frankly, I am not at fault. This girl was not born depressed.
The levels of bipolar are I and II with a milder form, Cyclothymia (*a).
My understanding is the disorder is about types of depression. To make it even more confusing, there is also unipolar depression (*b). Furthermore, there are Borderline Personality Disorders:
(*c) […] instability in relationships, efforts to avoid abandonment, identity disturbance, impulsivity, emotional instability, and chronic feelings of emptiness […].
Types of Bipolar Depression – Depression and Bipolar Support Alliance
Bipolar Depression vs. Unipolar Depression
Boderline Personality Disorder Symptoms