What does this dream mean?

Last year in march i had a dream about my friend Andrew dying. We were driving around in his car with his friend sean and hiding in buildings we were running away from people trying to shoot us. Well, Andrew got shot and died. The only reason i remember it was in march, is because i wrote on his wall telling him that. This year in March on the 13th, Andrew and his friend sean died in a car accident along with two other people. Is this just a coincidence or a premonition kind of thing?