Do not, thirteen year old Pariah, under any circumstances, follow your dads advice and go to the Boys School. Sure it's the best school in town but you're going to be railroaded down a path you don't really want to go down and you're gonna throw it all away in 4 years when your parents split up and you taste sweet freedom. Also, you know how you don't really know how to talk to girls...yeah another 4 years with no contact with them really fucks you up later on, I can't even look a woman in the eye, so fo fuck sake go to a mixed gender school.
Oh, and lose weight, look at me, do you want to turn into me? Don't cut your hair either, you'll love it when it's long and by the time you think about growing it back you'll have started to lose it. Yes little Pariah, you're going to start going bald, not too badly at first but it's going to happen.
Anything else? Oh yeah, cigarettes are bad, you may think it's just a social thing at first and they taste nice, after six years of it just the thought of giving up makes you want to break things. Learn to drive at 17, don't leave it till you're 22.
Have sex, forget relationships being a wonderful thing because they ain't, or to be fair we wont know if they are good or not because 10 years down the line...still single buddy. So if you get the chance to sleep with some girl, do it. Stay away from the Internet, it's not a substitute for real life.
Hang onto your friends, they actually do like you, but you end up pushing them all away. Theres nothing wrong with gay people, or anybody for that matter, regardless of how you were brought up. You'll figure that out eventually anyway but a head start wouldn't be a bad thing would it?
Show your mum you love her, nothing wrong with giving her a hug every now and then you know? I still can't do it but if you start now, who knows maybe you'll both be happier people. Your Dad isn't the demon you think he is. He's fucked up now but when the marriage ends he becomes a different person, and that's gonna happen regardless of anything you do, so don't worry about him.
I know I've mentioned it already, but lose weight, however this could be the most important thing I can tell you. The older you get, the harder it gets. It's probably too late for me, but for you? Live our life well young Pariah!