The touch this time, was unexpected and caused him to stiffen slightly. After a moment, he finally relaxed, tilting his head slightly as he looked at her. "Me, weight of the world? Nah. I just go with it." He lied, hoping she wouldn't know it was such. In all honesty, there was a battle going on within the angel's heart. He was still completely torn on whether he should help the humans or not, and the fact that Dean had come to him and asked for help was complicated.
He hated Dean more than anything in the world for what he'd caused Cas to do. The falling, and the losing of his Grace. But Dean was the only one who could save them all. At least, to Balthazar's knowledge. And to see a human put aside his pride to ask for help... It was hard to ignore that, and hard to decide what to do. If he ignored the human, he'd be no better than his brothers. And if he ignored his brothers, he'd be more of a traitor than he already was.
But he pushed that aside, there was no reason to dwell on the painful moments now. Not while he was with an angel that peaked his curiosity like none other.
Balthazar smiled before speaking, keeping his arm's folded over his chest. He wasn't sure what else to do with them, touching, and all of that was more human. He'd spent a lot of time around them, of course. But it still wasn't something he was comfortable with. At least, not with another angel. He wasn't sure how she would respond to human interactions, although, she was doing them herself.