Baby Brother Abuse! Someone call the cops! Lock him up for abuse! Then again, big brothers were always bullies. Not that it really hurt. He knew if Dean had meant it he would've beaten him black and blue.
"I told you I was fine. You should've trusted me." Even if he was lying through his teeth. "In fact, I'm kinda pissed you ran off to Cas behind my back. Makes me wonder what else you've been hiding from me."
Uh, Sam? Pot. Kettle. Black. Don't throw stones in glasshouses, and all those other phrases.