Do people predict the future through dreams?

This is a thing that happened to me, so many years I still remember, I was in elementary school there was a table in his grade is more famous, sports are good, long good, we have always been at the same table, when I was in the 6th grade I had a dream, in the dream several classmates are doing play together, suddenly he told me that he was leaving, I asked him what to do, he did not answer me, I woke up, generally I don't remember in my dreams, now it is almost 30 years, I still remember the scene at that time, and then I did not take it seriously, Junior high school classes were not together, and then they left home to study, work, about 10 or so away from that dream, my sister said to me one day that he was dying, and the leukemia hospital did not accept it, waiting at home. It was gone in a few days, and I didn't have the courage to go back to see him, and this matter has always been hidden in my heart