Don't get too cocky, everything can and does fall apart and your successes could have just as easily been failures.
Everyone is toxic, even you. Be nicer, including to yourself. It might not make a grand difference, but kindness goes a long way.
Stop thinking you're different or better than everyone. Being the weird artsy type in high school is something that happens at every high school. We're all just archetypes fulfilling the path our circumstances put us on, nobody is special just as much as everybody is special.
Nothing matters, so try to enjoy it and not hurt anyone.
Oh, and stop trying to fucking OD on pills, it's not gonna work! Lol