Stubborn.

He doesn't see how wrong he is.

He never does. That's why he's so stubborn; he never sees his error until it's too late. Always running full force in one direction, it seems like he doesn't know how to stop a think. He'll run in circles before he stops and listens to you. Any time you ask him to stop and think he freaks out like slowing down to think before acting will kill him.