Scary. Have you informed your friends that you're having these dreams? Or spoken to a doctor? It may be the sign of a deeper illness or cause...
I had recurring dreams of my dad killing my family
Death also means transition and change, maybe just means the dynamic of your friendships is changing?
thats totally normal :((( if it really bothers you, then you should go see someone to help you ,. those dreams mean that you are afraid of losing your friends and your willing to do anything to save your friends
talk with them too about your dreams too, it should work
tell them to save up some money for their funerals , rip