sixth form was defo the 2 most depressing, stressful and miserable years of my life and even though I didn't hate my subjects at first I couldn't wait to leave! nearly left in yr 12 but stuck it out and now I'm living it large at uni!
my advice if you hate it is to think of the end result...it's only 2 yrs out of your life!
also if you love certain subjects during school expect them to get x10 harder! (french )