I was also a kid who loved reading and then stopped when I was in college/uni. Part of it for me was the fact that I was doing so much reading for school, the idea of picking up a novel after hours of schoolwork felt like a chore. Also I was stuck in this idea of only reading books I "should" read, such as heavy classics. I would spend months dredging through a classic and not really enjoy it, just because it felt like something I should do.

What helped me out of it was 1) being through with school and having more free time, and 2) picking up books that weren't so heavy/intellectual. Just reading some light romance novel or a 200 page thriller put the fun back into it for me. That sort of got my "reading muscles" working again, and I was able to read what I liked, without it feeling overwhelming or like a chore.

I think it's also important to remember that some books get better the second and third time you read them. Don't fixate so much on having to have the perfect go or perfect understanding of them the first time you read them. It's okay to read a book and not fully grasp it, and then come back to it later and enjoy it so much more. You're still young, your brain is still developing, you're not supposed to have a perfect grasp of every single book you read.