An indifference to living can take hold of one’s emotions. Questions on an existential scale create a cycle of asking why anything matters. Quoting Albert Camus’ The Stranger: “I just stood there at the bottom, my head ringing from the sun, unable to face the effort it would take to climb the wooden staircase and face the women again. But the heat was so intense that it was just as bad standing still in the blinding stream falling from the sky. To stay or to go, it amounted to the same thing.”
If life doesn’t matter and nothing is real, why not just choose to stick around a little longer.