Long Distance— NEED ADVICE

Okay so I met this guy on a dating app and we live 2-3 hours away. We’ve been talking for weeks and are finally supposed to hang out this weekend. It’s not just like a hookup/booty call talk either. Like we’ve talked about our futures together and everything. But these past few days he’s seemed really distant and I’m not sure why. I’m really worried because I really like him. I don’t want to mess thing up and ruin it all. We’re both young so I’m not expecting to be with him forever, but I still want to be with him right now. My parents don’t know about him yet because it’s never been brought up and they’re not really for dating apps. Anyway, I’m worried about everything. Any advice on what I should do?