To dream that you are sad actually foretells a happy turn of events. It is a positive dream that means good things are going to happen to you in the near future.
To dream that you are sad, suggests that you need to learn from your disappointments and make yourself happy. Try not to dwell on the negative. The dream may be a reflection of how you are feeling in your waking life.
If you dream you are sad about some event, then in reality you expect disappointment in those cases in which you are expected to succeed. A dream in which you see the sad others, mean that someone tries to invade your plans, thereby upsetting them.
Alot of joy.