Dabi knows what he feels is obsession.

It isn't love, where everything is rainbows and sunshine all the time; it's a deep-rooted jealousy that takes over his entire body, and he can't stand to see you anywhere but at his side.

He's always been like this, he hasn't changed. You knew what you were doing when you went out with him, so why is it his fault that he's acting this way towards you? He just doesn't want to see you hurt by anything but him, isn't that what you wanted when you agreed to date him?

And leaving right in the middle of date night, yelling at him like he's some kind of villain... this is bothersome.

"Don't be too quick to leave, darling," he chides, wrapping an arm around your shoulder. "Let's go back together, okay?"