You should tell someone if their partner is manipulating them.
Lisa's friend Stephanie has a manipulative boyfriend whom she loves dearly and thinks that such behavior is normal.
Lisa wants Stephanie to be safe.
Lisa tells Stephanie that her boyfriend fits the profile of an manipulative man and that she is in danger.
Lisa tells Stephanie that if she ever needs help with anything, she'll be there to support her, hoping that she'll call.
Stephanie realizes that she's in trouble and begins to work to change the situation.
Stephanie doesn't see the problem and the manipulation continues, wearing Stephanie down.