They Start To Justify Their Actions
As the old saying goes, “everyone’s the good guy in their own story.” They’re trying to justify what they’re doing to themselves by making you out to be a worse person than them. They obviously know that they are the bad guy but don’t want to admit it.
It goes hand in hand with the inability to accept responsibility for their actions. No matter how guilty they are – they never admit this. Because they don’t want to be the bad guy they make you be that person.
Whatever bad happens they blame you even though you had nothing to do with it. If you discover that they cheated on you then they will say that you are responsible for it. You never tried hard enough and that is why they did what they did.