Yes, he bullied you before the outbreak. Yes, he never really interacted with you otherwise. And, yes, maybe he hurt you. But no, he doesn't want you to die.

So, when he finds you running from zombies, he was glad, despite himself. He grabs the back of your shirt, his hands are bloody. "Hey," Gwi-nam says, still smirking when you look up at him, you're obviously scared. But he doesn't sound concerned.