Looks barely matter, I don't care who the hell you are, unless you have some extreme disease that deforms your face, looks are not the limiting factor on your attraction. We are all in highschool, so I will concede that in highschool, girls are much more superficial, but even then looks are only in yer head.
I see these other guys here saying "Yeah man! That's your problem, go FIX IT". But, thats not the root problem, its all you. If you can destroy that mental blockade most people have that limits their game to their looks, you will do 10x better with girls. If you care about your looks, you are essentially placing better looking girls on a pedestal, which is not what you want at all.
What I will agree with is Jeff in this topic, because what he said is 100% true. Focus on learning, but mainly focus on yourself. Going to the gym is for yourself! If you go to the gym to impress the opposite sex, that's a terrible mindset, which will eventually deteriorate.
Again, looks are a mental obstruction you put up for yourself. If you are trying to get with a girl that only cares about looks, then she is not worth your time.
Now I'm not saying you shouldn't clean up, what I'm saying is that you shouldn't focus so much energy on just your looks when it isn't the biggest factor to getting girls in highschool.