• Don't brood too much over moving, you will only loose six months that you could've spent making friends. Trust me, your high school years will be amazing, but they'd be even better if you could just... stop trying to be inaccessible.
• Don't confess to your best friend. Ever. Even if it gives you closure, it will only make you stop talking to each other over time because of the awkwardness. Don't help her have a girlfriend either, they'll just give you headaches because of how much arguing you have to fix up. It'll sever your group too.
• Please, please, please dress up better during your first year of college, and socialize, you idiot. You won't be able to have only online friends forever.
• Don't study for medicine, you will change your mind at the last hour.
• When you go with your only friend from university to the movies, your mother will call you and ask you to buy something from the supermarket on the way home, please ask him if he wants to come along, or else you'll make him think that you hate him.
• Stop crushing over that guy. And when you hear people from class talking about your friend having a girlfriend... don't believe them. They are just testing you out. You'll just get hurt because he didn't tell you and stop talking to him for a while. Don't.
• Please, even though you think it's impossible, study more. Your future really depends upon it.
• That guy you meet at your part-time job? Not worth it, forget about him.
• Be kinder to your sisters.

I think I took this way more seriously than I should've... But damn, so many things my idiot, younger self should know.