While you are saving a cat from the streets, not realizing there's a car about to hit you. It did. Hence, killing you.

That was supposed to happen but Death intervened. He stops your soul from dying because of the reason he liked you. He begged you to let him court you, to which you agreed despite not liking the idea.

Maybe if you're the last person on earth, I'd give you a chance. You joked with him, during your date.

The next morning you woke up. You saw no one but you... and Death.