Sorry for the late reply, but your not the only who does that, ever since I decided to write books, the same thing as been on my mind, I
I recommend choosing another hobby, the one that takes your mind far away. Everyone thinks differently, but for me, my school will be starting soon, which means I have friends and school work to take my mind off ff easily.
And don’t hate your book, it’s your brainstorm, all your thoughts, I daydream a lot about scenarios. My book is all my daydreams jumbled into one. Plus keep doing your book, from my point of view it’s getting successful as time passes.