>The problem is, i can't stop reading or seeing content about books(since I'm depressed and books it's the only good thing i have besides some silly videogames in my life)

Yes, you can. The books are the good thing, read books. Content about books is what ruins your good thing for you, so don't read the content. (So getting off socials, as the others have said is most likely to be a positive change). Or at least don't read the content you're reading now: find/focus on something healthier, like writing your own reviews, making/engaging with fanart, looking up stuff about history/mythology/the author. You'll need to monitor how you feel and moderate the content accordingly, though.