Trade in that helmet and playing field for a wig and a stage; you can still pretend to be someone you aren't, it will be fun, and you'll keep all your brain cells.
That girl you just started dating is going to be your first love, and she's going to take your heart out of your chest and throw it into a ******* wood-chipper. Well, that's what it will feel like. Let her. It will get better.
Save that money and buy that guitar you've always wanted to learn how to play. Just don't be that ******* who learns to play Wonderwall for his first song.
You're going to be an ******* when you're 20. It's a phase. Make sure you apologize to everyone afterwards, because they're going to be some of your most valued friends down the line.
Talk to that Zach kid. He's going to become one of your best friends.
I've already said too much; I don't want to spoil this for you. Figure the rest out for yourself. See you when you get here, kid.