I agree high school is important, depending on what University you want to go to. Be sure that minimally, you know how to spell properly, can use basic language in the appropriate context, and have decent punctuation abilities, unlike some of the posters on this forum.
Be sure you know your math, at least through Algebra, too. You will need it to get into college level math classes.
As for the social aspects of High School, they suck. Learn what you can, and remember that it won't last forever, thank god.
Relax... I'll need some information first. Just the basic facts - can you show me where it hurts?