Like Dean could ever really kick Sam out of his life. He'd let him go, if he really wanted that, but it'd kill Dean even now. He needed his brother in his life in some way... and it was selfish, he knew it. He's just never been good at letting Sam go though.

When he comes back to see Sam back in bed, shivering and looking even worse for wear, he puts their food down on the table beside the bed and goes to slide an arm around Sam, pulling him in. "Hey, Sammy, come here. You look like you're freezing, dude."