The feeling that you are wasting your life is normal. We always want to move onward and upward, and stagnation, even in a place that's fairly comfortable, feels like a waste.
Thankfully, you're 13, and the game doesn't really start until you're about 16 or so.
The most reliable way to escape this feeling is to find a talent and develop it. Doesn't even have to be something that's taught at your school. If you're good at something or enjoy something, follow that. If you see something that interests you and you think to yourself "gee, I wish I knew more about that" or "I wish I could do that", you can. I was intrigued by CG animation at around your age. Thought I'd never get the chance to learn how it's done, let alone do it myself. It's my job now, and I'm good enough at it that my work gets very positive reviews. It's not even the subject that my degree is for. It was just something I started doing in college because I had a lot of fun with the Myst games and wanted to try making my own imaginary worlds, and it turned out that people are willing to pay a lot of money for people who can use those tools.
The thing you have to watch out for is fear. Not the fear you feel when standing in a high place or when a car is coming at you faster than you thought it would, but the fear of failure. That is what will hold you back, and what will cause you to wake up at 25, 30, or 40 and realize that you haven't done all those things that you planned to do. Resist the temptation to stop pushing forward just because you got to a comfortable spot. The feeling that you're struggling is normal, and is a sign that you're still on an upward trajectory. If you're not struggling, chances are you're stagnating, and stagnation is what gives you the feeling that you are wasting your life.
You will need to take risks and make sacrifices. The sacrifices that you make will depend on your goals. Being the best at your chosen field usually requires you to sacrifice your social and family life. Having close friends and family often requires you to make professional sacrifices. If you want both, the sacrifice will be your own time and perhaps health, and taken to extremes, this will cause the collapse of all other areas of your life. They don't always conflict, but they frequently do. It's very similar to the investment of points in attributes and skills. It's very difficult, maybe even impossible, to have high scores in everything.
So there's my advice: Know your talents, know your goals, know your limits. Learn to recognize fear and evaluate whether it's protecting you or holding you back. If it's holding you back, learn to move forward anyway.
Good luck!