Complete opposites experience-wise

Kinda just need reassurance I guess. I've gone on one date (planning another) with this really sweet guy. The only concern I have about him is that he's never had a girlfriend before. He's extremely shy and quiet. I was his first date, he's never had a first kiss-- he's 18 years old by the way. I, on the other hand, have had 2 serious relationships, I've "dated" over a handful of guys, not a virgin etc etc, I'm 19 almost 20. And it's not that I have a problem with that exactly, it's that I worry if when/if we do become something more serious, what if one day he realizes he wants to really live that "single life" and starts to regret not dating more people when he had the chance? I lived the "single life", I dated lots of people when I had the chance and because of it I know what I want now. But he's never had that experience. I'm assuming because he's so shy but I don't really know for sure. I guess I'm just worried he'll end up changing his mind about me cause I've been through that so many times before. And I really don't wanna put myself through that again...has anyone had any of the same concerns as me? Or went through something like this? Am I freaking out over nothing? Helpp 😓