Weird dream

I had a dream last night that really confused me. In the dream, I found out through Facebook that a very old friend of mine died. (Let's call her Mary because I'd rather not reveal her real name here). I was devastated. I went to some sort of memorial service for Mary and I cried the entire time. I remember saying, "I cannot believe that Mary is gone. I've been crying for the past six hours." I found it odd that every one else there (who coincidentally were friends I know now, who never knew and have never met Mary) was very calm and didn't seem too sad. People were even laughing. I said, "Why are you all so happy? You should be sad!"

I saw people whispering and giggling. In walks Mary wearing thick black eye makeup and a black dress and says, "I'm not dead! We played a trick on you!" Obviously I was very hurt by all this. Everyone was laughing because I believed that Mary was dead. I ran out crying while everyone continued to laugh.

I'm not really sure what this dream means and why I had it. I hadn't been thinking about Mary that much so I don't know why she popped into my brain. I don't know what it means if you dream about someone dying. It's probably not a good thing. All I know is I woke up crying from this awful dream and I wish I could understand my brain sometimes.