Help! Where is this from?

[reality0junkie]

 I just want you to be okay. You would do the same for me, you know you would. -Dean

Question is.. what episode from Supernatural does this come from? Help anyone? 
This has really been bothering me.. can't figure out when Dean says it.. D:

Edit:
herecomeskrys  is awesome. :D
It's from WHEN THE LEVEE BREAKS.