To dream that you broke a promise which was made, means that you feel guilty about something. Perhaps you did the same thing in your waking life as well. If the promise is broken by other person, you are feeling abandoned and betrayed by this particular individual, therefore you dream about it as well. To get more detailed dream interpretation, please also see the meaning of betrayal.
Break a promise dream meaning
Read more about dreaming of Break a promise in other dream meanings interpretations.