Why do some kids seem smarter than me?

I can't even stay off my phone. I mean I'm so ADDICTED to my phone and I don't even read much books anymore. If its interesting I'll read it. My cousin who is 13 lives her electronics but she prefers to read over her electronics. I think that's great but I feel so stupid. When I check out books, I never read them. Or just read a few pages and stop reading. I'm so lazy.