First actual date tomorrow! Need advice!!

Ok so I am 16 and tomorrow I am going on my first actual date. And it’s not even a real date. This guy I’ve been talking to is going out to eat with me tomorrow for a late birthday dinner thing. Butttt my parents will be there and so will a lot of my friends which we are both fine with. I hate eating in front of guys cause I’m very self conscious idk why. And we’ve already hung out before. We went to watch a movie and it was great but we didn’t have to actually like talk cause you know, we were watching a movie. We kissed and held hands and when we did talk I did pretty ok. I’m super shy and get tongue tied and can’t talk when I’m talking to someone I like. He’s very outgoing as well he just graduated high school and I’ll be a junior when school starts back up. Well anyways he was and still is super popular. (Don’t ask how I managed to get him cause idek) and he doesn’t have a problem talking and stuff but when he talks to me sometimes I just laugh or nod or shrug my shoulders and I just can’t get words to come out of my mouth. Someone please give me advice so I don’t scare him off. We text so great. I can text him so easily but it’s difficult in person. Help help help!