I've been afraid of this. I've been working at a company for over 2 years. I'm 17, started here right after I turned 15. I've worked on many high profile projects. I've experienced a lot of respect, even with my age, but I don't want that to fade away in years to come.
You're probably going to encounter a lot of imposter syndrome imposed on you by the people around you - ignore it, you're just following a different track to the rest of your peer.