You deffinitly do something to help the world. You being you is helping someone somewhere. I understand that therapy is expensive but if your school has a psychologist on staff you could probably talk to them for free. The future is a mysterious thing but personally I think that is what makes it exciting, worth seeing. If you like to play games maybe you could join/start some kind of club at your school. You would be able to do something that you like to do and meet new people as well. If you ever need to talk Im sure everyone here is more than happy to listen
Best wishes
-Jason