Hurley has also felt responsible for a lot of deaths. That one guy was killed and on the deck or something and he took the blame cuz of his weight. Also after he won the lottery, he linked deaths to his bad luck and felt responsible.

Juliet may feel responsible for the death of her ex-husband. She wished for him to get hit by a bus and then it happened.

Jin probably feels slightly responsible for Sun's lover jumping out of the building. He didn't kill them but felt connected to it.

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Because all we really need to survive is one person who truly loves us. And you have her.