Why do i always think of DEATH?

okay, YES im depressed ...not suicidal tho. I imagine myself dying...like when im driving i have visions in my head of someone hitting my car and i see myself dead...its scary. I always look at the latimes homicide map to see who has died in my area and read about how they died. I am so paranoid of dying but at the same time fascinated with the way people die...WHATS WRONG WITH ME! how do i stop this...i know its morbid...what does it mean...