I go to school too, and I'm in college (I'm a freshman right now), and I'm in one of the best schools here in my country... And man, do I feel so left out! When I first knew that I passed the entrance exam I was so excited and eager to study there. But then the people...
I'm not the type who recites in class much, but in high school, I pretty much didn't care if I wasn't listening in class (and I got high grades). But then I'm not in high school anymore. My new classmates are so opinionated, that when I look at my own ideas, I feel incredibly dumb and small. Right now, I'm not loving my school life. And my social life is going down the drain too. They are soo serious with their studies. I don't want to be that serious with my studies. But most of them are that serious. And I think that sucks.
Most of the time during breaks 'my friends' (can't really call them friends yet) talk about nothing else but studies. And I miss high school when you were just chilling. And laughing with friends. Sometimes gossiping. Sometimes not saying anything at all, but still comfortable with the silence. Just talking about whatever comes into mind. Dumb discussion. Nothing about the government policies and all that adult stuff. I hate the pressure that I'm feeling. Because all of my classmates are intelligent, I find it hard to excel. I've never felt so stupid around those ambitious dudes. I am affected mentally, physically (yo-yo-ing weight), socially... and I am losing interest in what I do. Most of the time I wonder what if I chose another school. I already passed other entrance exams, but I chose the best. The best school in the country, but maybe not for me.
You're still thirteen, and you've got a lot of things to learn still. You'll meet many people that would help you with what you're feeling right now. In high school, I met my true friends, and up to now, we're still constantly talking on the phone and texting. I'll give myself time to adjust, since I know that I'm not the type who warms up easily to anybody. Give yourself sometime too. Be proud that you are in advanced classes, not many are 'smart' enough to be where you are now. I'm trying to be proud of myself too, you know, trying to create a positive mindset. Let's be proud of ourselves.