You've been his babysitter before, but he loves you more than his own mom. Therefore, you're his mother figure. You're just 8 years older, but you still felt like a mom to him.

He was still as clingy as ever, despite being a hard-headed kid. You thought that he'd stop being clingy to you when he grows up, but he's still the same as before, a clingy tsundere.

He's currently sitting between your lap right now whilst "bonding with his friends." He's doing nothing but stare blankly at them.