Neither can Ignis. He was just repeating stuff he was telling himself for the last few hours, weeks, months. Years. Thinking about living and future simply hurts right now and nothing he can say can help.
Ignis doesn't want to live either. But he can't say that. Not to Prompto. Because if he loses either Prompto or Gladio, he really might do something--

His own sobs are quieter, but his body can't hide them, shaking as they come, muffled from the way he buried his face in Prompto's hair. Oh, if only this was a dream. A horrible, terrible nightmare. But it wasn't - it was a living one.

He doesn't know how long they were sitting like that, just holding onto Prompto, letting and crying with him. The sound of footsteps, even though they were in the distance, makes Ignis lift his head up.

...is it stupid to hope for an additional pair of footsteps next to Gladio's?