Read as many different books as you can, and stay out late with your friends as much as possible. If you can balance these, you'll be good.

 Don't go out when the river current is too fast, even if the coaches tell you to. Its not worth it.

 One day he will realize his mistake- and by then you will realize you never needed him in the first place.

 I know you think relationships are stupid, but deep inside there is someone you long for. Go get him.

 Go to your classes, as boring as they are. Better to be bored than to be failing.

 Get your brother help your parents won't do it, so if you don't no one will...

 I know that you thought that he was "the one." But at the end of the summer he leaves you, and he breaks your heart. Just take a deep breathe and remember who's still standing at your side. And think of all those who still love you. You're heart heals.

 Invest in Google. a lot.