Hi and welcome to Linux Mint! Stay true to yourself, it will get better. For some inspiration, read the "developer of the month" feature here: http://blog.linuxmint.com/?p=2137
. I think you may be inspired.
Perhaps there is a Linux User Group in your area, and it would be fun to visit one of their meetings? (If your parents agree.) See a list here: http://lug.org.uk/listings
. They may possibly have a program for teens and that could be a way to meet teens with similar interests as yours.
If there is any bullying going on, consider joining a martial arts class. I was a scrawny nerd at your age and was bullied for a short while. Joined Judo and later Karate class and that put an end to the bullying