You and Dean were just hunting buddies, you helped Dean and Sam in any way to stop the apocalypse but there was no way.

Ruby lied to Sam, then killed Lilith.

Sam told Lucifer 'Yes' to take over his body and begin the apocalypse altogether.

now 5 years had passed since 2009 and since the apocalypse began, everything was different now.. even Castiel who was now just a mortal had changed.

you and Dean together with the other survivors took refuge in 'Camp Chitaqua', in addition to taking refuge from Lucifer it was also to take refuge from the Croatoan virus.

now for some strange reason you and Dean are together, in fact you sleep more in his cabin than in yours.

You and Dean were cuddling before he goes on a mission with the others, he was the leader after all.

"You should go" you tell him

Dean:"five minutes.." hugs you tighter