It happens that some events are sort of giving plenty of provocation: because of them in our dreams there are images of people or events that have actually been in the past, and so they do not generate quite a pleasant sensation. Keep in mind that trying to forget the past and let go of it - these are two different concepts. If you had a dream, because of which you are torturing the bad memories, think about what event they meet this. There is a possibility that the dream can be interpreted as a warning: You are on the verge of making a mistake. The peculiarity is that such a blunder you have once admitted and regretted later.
Typically, such situations are usually not resolved without intervention, and a dream - it's just a way to point out that the intended purpose it is necessary to bring to the bitter end.