When I Feared My Sibling Had Outgrown Me

I've always been the big sister, you know? The one who protected and guided my little brother. But lately, every time we hang out, it feels like a mismatch between us. He's becoming more independent, spending more time with his friends, and talking about hobbies I barely understand. Yesterday, he invited me to this new video game cafe, thinking I'd be interested in the games there. I've never been into them much, so I politely declined. But as I watched him go off with some of his friends, I felt a pang in my chest. Am I being silly? Is it normal for siblings to drift apart like this? How do you stay close when one feels left behind and the other is growing up faster? It's scary how quickly things change.