You don't have to advertise your hunger for knowledge. Just go about the business of improving your mind by learning anything and everything that interests you. The more highly developed that your mind becomes the more appreciation and joy you will take from everyday existence. Pay attention also to developing your emotional self and your spiritual self so that you'll be "firing on all cylinders." I was a curious kid like you and I've always been thankful that I didn't sacrifice up my thirst for knowledge so I could be "one of the guys." You can still hang out, play sports and participate in extracurricular activities while you are gaining knowledge. You might find some kids who share your thirst for learning in organizations outside your school. You might even want to take a course at a nearby college, just for the fun of it.
Sometimes it's hard to listen to our inner voice that tells us who we really are when so many others' voices are chattering away with their expectations of us. It sounds like you have the courage to continue to learn and challenge yourself in a humble, dedicated manner. I offer you my encouragement and a guarantee that you will never regret your search for knowledge. You'll discover many people who will feel like you do about learning once you depart your high school. There's a whole world full of fellow curious, knowledge-thirsty kids out there waiting to talk and grow with you. Thanks for writing.