If you dreamed about Playing Billiards: You may be upset because of the people you love, It's time to leave the past behind. To see that you are playing billiards in your dream indicates that the person who sees the dream wastes his time, does not do anything for his future for himself, therefore he will regret it a lot in the coming years, and he should use his time better.
To see that a person plays billiards in his dream indicates that that person spends his days idling, that he is tired of working, that he is a sluggish and lazy person. This situation is expressed as the reason why the dreamer is not put in the place of a man in the society, so to speak.