Losing Ryry

Almost eight months together. It's been amazing. I love him and god knows he loves me. So why do we fight all the time? And why is it always about the simplest things. Like what music i'm listening to... Or why i'd rather go home then stay at school while he has classes. I'm always telling him to stay awake in class and do his homework, but the fact is he wants to drop out. He has said it before. The only reason he's still going is for me. That's wrong and I know it. But I love him. He gets angry and he makes me cry a lot but he also makes me smile and laugh. :( what to do? Advice needed.