Personality Disorders Support Group
Personality disorders form a class of mental disorders that are characterized by long-lasting rigid patterns of thought and behaviour. Personality disorders are seen by the American Psychiatric Association as an enduring pattern of inner experience and behavior that deviates markedly from the expectations of the culture of the individual who exhibits it.
The reason they say you are too young is because your brain is still developing. You'll get a full dio when they know it can't alter anymore.
Hope this helped
-Andrew
I am new also, feel free to drop a line, You are not alone
I hope you feel welcomed here and find any of the answers you are looking for.