You can't. Narcissism is a pervasive personality disorder. If you set boundary they will break it. The disorder stems from overcompensating for feelings of worthlessness. Counseling may provide balance but the BF must be willing to try.
Time and patience.
The senators went politically weak when they tried to regain power of Rome. They lost most of its political power and prestige.
For the economy to regain its power.
Cleopatra was reinstalled on the throne by Julius Caesar.
H
Catholics did not regain power
"The hundred days"
Yes.
France
The main purpose of the black codes was to regain power over the blacks and use the law to do so.
Modest is the usual opposite of narcissistic.
Tagalog Translation of NARCISSISTIC: mahal ang sarili