Do you completely shut down after an argument with your partner? Do you build walls around you so no one can peek in and see how angry/ sad/ resentful you feel? Do you avoid problems/ issues? If the answers to this are yes, then you may be a passive aggressive individual.
There are a number of times when one finds themselves unable to express the resentment and anger that they are feeling. Many may avoid expressing openly to avoid further arguments or conflicts and tend to bottle up their emotions. The subtle ways that their emotions do surface is passive aggressive behaviour. Basically, it is the indirect expression of hostility.