I dreamt that my fiance was dying..what does that mean?

Last night I had a horrible dream and I'm hoping that some of you reading this will be able to answer. In my dream, I came home to find my fiance laying in bed, writing a letter. He was writing a letter to me and it said that he was sorry but that it was too late and that the cancer that was just detected had been with him too long and could not be cured. The letter also said that he will miss our son but that he knows I will take good care of him when he is gone. Now, I wonder why the letter mentioned son when we don't have a child together. Anyways, in the dream I didn't want to accept the fact that he had cancer, so I went running to the hospital where I asked for a doctor that could see him immediately and confirm all of this for me. They said there was no opening for atleast another day. I said that I was a famous singer in the United States and that I want priority. (The dream took place in my home country, Colombia) and they granted that for me. So, I went back to the house to tell him that we could see a doctor right away and what I saw made something in my stomach sink. He was laying in bed, his skin was pale, he was sweating profusely, he did not look well at all. He was literally gasping for air. Beside the bed, on the floor, were a bunch of little statues of saints and of Mother Mary. He didn't say anything to me, though. It's just that how I saw him like that seemed so real, and I woke up feeling sick. So, to dream of a loved one dying, I would ume that's not a good sign. But I've also heard that it means the opposite, and that they will have a long life. But why did I have to see such horrible details and SEE him taking his last breaths? Does anybody have any knowledge as far as dream interpretations? Please help.