every time i try to read a book i can't concentrate because of my thoughts

I used to concentrate much better when reading. The last few years my concentration has been worse and I skin pick (dermatillomania) a lot. It's getting better with practice though, I'm working on recognizing the thought, letting it pass and then re-focusing. I've read 5 or 6 books this year which feels like the old me. I hope it improves for you as well.