Dive into a world of creativity!
Do you think Jimmy would have abandonment issues because of Lizzie, not saying its entirely her fault. She had her reason for leaving him behind which is why she left the book for him.
But at some point he had to realize his sister is not coming back which led him to leave the ocean which led him to also forget.
Now imagine him going through emotions and stuff and not understanding why he acts this certain way with people and then finds the book and remembers his memory of Lizzie and him and he's like ahhh It make sense now.
Jimmy lost Scott, but doesn’t know it and his sister forgot about him again. All I do is live in pain and I love and hate it. I crave angsty, but sometimes it really do be to much man. My poor Cod boi. And now that I’m thinking about it...... Will Jimmy forget too? Fuck. No. Shit. And imagine its slow for him and him realizing in horror of the lovely memories of his family fading. Him scrambling on trying to keep them from disappearing only for his last hope to be a book and quill. But all he can do now is stare at the words written in the book and taking them as truth hoping to one day meet those he has forgotten.