To dream that someone you know dies, means that you love this person a lot or have a special connection with him or her and you are afraid of losing him/her. The dream in which somebody you know dies could also mean completely different things, it shows that you are no longer in special bond, but only if you felt nothing because of the death of this person during your dream.
Die (Someone else) dream meaning
Read more about dreaming of Die (Someone else) in other dream meanings interpretations.