Dream About Zombies Betrayal Isolation

I appeared in the world with a bunch of friends, fighting off a disease that increasingly turned the population into zombies. When trying to fight off all the zombie hordes, me and my large group of friends moved from region to region establishing temporary bases fighting off and eliminating zombies, but every time I moved to a region there was a number of friends from my group that caught the disease and turned into zombies, to which I had to fight them off and kill them off too. Eventually, I went to a region where I had a small group of friends and even those friends turned into zombies and I had to kill them off to the point where I was the only person left to fight off all the zombies. I went back home to see if there was anybody else to recruit and there was nobody else there that could help me. I then realized that everybody there , where I was from had turned permanently into zombies. I then found out some people knew they had the disease and some of my friends were trying to betray me during the adventure. Then I woke up.