So you're about 12yrs old and your friends are around 15/16yrs old, that is weird. I'd be more interested in what a 15/16yr old has in common with a 12yr old? what do you discuss when you're with them? what things do you have in common?
My other question is are you tall for your age? sometimes that can impact on the age of friends you attract, if you seem taller /older than you actually are.