Hi 12-year-old Usehername,
By late October, you've just begun to settle into a private school in the city that you love for its challenging classes and great environment. I'm sure you've been quite enamoured by your grade 7 English teacher--she was the first "grown up" you've met that's been able to be responsible, on top of things, and perfectly on time and scheduled without losing her imagination. These traits are called xNxJ and you'll learn more about them when you're 19. (19, and in Africa living in a hut with creepy bugs, where you can read to your heart's content and run past the cattle to go take a surfboard down to the gorgeous beach. Yeah, you'll do some cool things when you're older.)
You should know that though your piano teacher is extremely kind and competent, her brain is a lot different than yours. It will truly only help you to look for all the "hidden patterns" you asked her about--it won't "confuse you" like she argues. Go on the Wilderness Trip sooner; these people you'll befriend later are going to be way better and more interesting friends than the jocks you hang out with now.
Things are pretty sweet in your life right now; they'll get progressively harder as you get older. You'll definitely have plenty of fantastic moments, but you'll deal with completely incompetent and irresponsible coaches and various other adults who break the law or otherwise do more harm than good to the teens they're responsible for. When you're just out of High School, you'll be watching 2 loved ones die too young (one slowly and painfully and one suddenly and tragically). You'll learn to value your relationships first and foremost, but you should learn this earlier and make more of an effort to connect with those that are around you.