Anger and frustration will inevitably accompany your manufactured feelings of jealousy.
They will use this to devalue you further with accusations of 'craziness' and mental instability.
Secondly, it keeps you focused on satisfying their needs as you look for ways to hold on to their affection.
Thirdly, your ever increasing desperation gives them the opportunity to label you as 'crazy' and 'paranoid', as they accuse you of over-reacting.
They do this so that you are less likely to be believed when you opt to reveal stories further down the line of their emotional abuse and crazy-making.
However, these cordial periods will be short-lived as your happiness is a reminder to them that they need to re-assert control.
Firstly, it keeps their ego as fully inflated as possible.This process begins almost immediately during the initial idealisation phase of the relationship.The psychopath/narcissist uses crafted charm, mirroring and intense flattery in order to make you believe you have met your ideal partner in the form of a devoted and loyal soul mate.We often read that psychopaths/narcissists experience a limited range of emotions, and those that they do experience are largely shallow and fleeting in nature.However, they are extremely adept at reading and manipulating the emotions of others, in order to exert control and influence.