There is a reason Passive Aggressive behavior is referred to as "crazy making behavior." If you've been in a relationship with a passive aggressive you fully understand how insanity producing it can be trying to maintain such a relationship.
The passive aggressive has an inability to express anger in a healthy manner. Their feelings may be so repressed that they don't even realize they are angry or feeling resentment toward a relationship partner. They may be sincerely troubled by your response to their actions which plays a huge role in you, the partner, questioning your own view of what is happening in the relationship.
Due to their own lack of insight into their feelings the passive aggressive often feels that others misunderstand them or, are holding them to unreasonable standards if they are confronted about their behavior. Passive aggressive behavior is a form of covert abuse that can damage and eventually destroy a relationship.