Once in highschool

Yeah, and it's not just me but the WHOLE class. So, this 2 guys (lets call them alvin and fahri) always quarreling, bully each other. But when one of them sad or strugle over something (lets say alvin), fahri will be there for alvin, support him, cheer him up. And it's vice versa. We all know that they are really a bestfriend, but sometimes their action are too much for you to name its a bestfriend relationship. It's more like an old married couple lolololll.