Enjoy getting lost. Once you stop worrying and start exploring, you have a lot of fun.

 Not graduating college on time wasn't a horrible mistake. That last 6 months with your friends were some of the best times.

 Stop trying to be perfect and hide your flaws. You will find someone who thinks you are perfect just the way you are. Flaws and all. I promise.

 Hang in there. Even if she's your mom, don't feel obligated to endure all the crap. You've put up with so much. One day you won't have to anymore. It will be so liberating. Wonderful people will fill that void. I promise.

 Try harder to help him with his addiction. Intervention. Call the cops. Whatever you have to do. Eventually you lose him forever...

 Stop eating boogers.

 Never fall for your best friend.

 Tell them you love them. You'll wish you had said it more, later.