I think Christine died in the car accident, and at first he thought that they both survived and were really luck to do so but then he realizes shes dead. this realization comes at "That's truth," she said. "We should be dead.
I should be sleeping in your bed.
Instead, I'll crash on your floor."
The "I'll crash on your floor" is him giving up, giving in to death to be with his love.
I think Christine died in the car accident, and at first he thought that they both survived and were really luck to do so but then he realizes shes dead. this realization comes at "That's truth," she said. "We should be dead. I should be sleeping in your bed. Instead, I'll crash on your floor."
The "I'll crash on your floor" is him giving up, giving in to death to be with his love.