Writing this novel is like having an ongoing argument with myself, where one half is constantly going: 

OMG WHAT IF THIS IS NO GOOD? WHO WOULD WANT TO READ THIS? IT’S STUPID ISN’T IT? IT IS! IT’S STUPID, IT’S TRASH, IT’S WORTHLESS, LOOK AT THESE WORDS THEY ARE NOTHING. I AM A SHITTY WRITER. NO ONE WILL WANT THIS STORY. WHY THE HELL AM I WRITING IT?

and then some other, much less excitable, portion of my brain, pipes up occasionally to say: 

Because it’s the story you want to tell, asshole. Now write it.