Do you play video games or games online? Sounds like a video game. If I had a dream like that I would think that in my waking life it feels like a battle and I literally have to struggle to keep my head above water and survive. The fact that in your dreams you started out alone and then that blond girl appeared, maybe you're looking for help in your waking life? As for the realistic sensations of the dream, I'm sure there is a scientific explanation for it, like lucid dreaming. I recently had a dream that I was flying and it actually did feel like flying. I looked it up and it's called a lucid dream. You should talk to a trained professional about these dreams especially since you've been having them reoccurring for the past year. Peace.