After all, We're Alive is a Story of Survival. And who else but Skittles is a solitair human being in a zombocalypse who managed to survive? None we know of. So why would he die w/o us knowing or learning about his fate?

Time will tell ...
... or Skittles, reading all the logs and telling this story ... Rumors are that the show is the narration based on all the logs/ diaries written by the survivors ...

Best wishes!
Liam