When I was about 17 I got to this point. I thought that everything bad that could happen to me had already happened, so clearly: 1) I was invincible 2) anybody who didn’t like me could suck it and 3) only good things were in my future. They had to be, statistically speaking.
I think I need to adopt this philosophy again. Maybe minus the invincibility part, though, because I’m pretty sure I’m not.