You still don't get it. Maybe you never will, but I feel it is my duty to explain it to you yet again.
All is real. Everything. Everything you write, every thought you have, is real inside your head. Thus it is real outside your head. Thoughts are things. Put them down on paper and they come to life. They can affect the world. They can change the world. They can be changed by others.
Some ideas are different. Some ideas exist independently of everything. Independent of the world, of the universe, of space and time. Some ideas seek to creep inside people's minds and become real.
Are you listening? Are you sitting comfortably?
You made it all up, but they were always there.
Truth and fiction are closer than you think.