I'm looking for a fic where Kurt has been in a car accident. While he is unconscious, he sees his mom who tells him he has to choose: live or die. At first, Kurt says he wants to die because he is tired of everything and his dad has the Hudsons now so his mom decides to show him what would happened if Kurt died. We see of his dad and ND are devastated by his death. Later we learn that the other car involved in the accident was Puck's.
EDIT: FOUND it's Hearbeats and Promises by Equifinal, here is the link