I had a mustache and sideburns in middle school. Yeah it can be annoying at that age because it's just not thick enough to look good.
I absolutely abhor mustaches personally but i think you could make it work for you so don't focus on it so much as a negative thing. If you absolutely don't like it however then you should just go ahead and shave it off. It'll look worse as it's growing back in though.
"What have i done.? Is it too late to save me from this place? From the depths of the grave? We all are those .. who thought we were brave."