Barney's eyes widened when Robin kissed him. He smiled when she moved back and called him awesome. "Duh," he said, but he didn't think it came out as confident as he was aiming for.
He swallowed, looking back at Billy. He was so nervous, and Barney wanted to help him with that. And also, maybe that moment with Robin was a little terrifying, so it would distract him from that.
But mostly to help Billy. He didn't look like he wanted to leave, so Barney was going to take that as a sign to keep going.
"It's okay," he said. "We've got you."
He glanced at Robin, winking at her and leaning in to kiss Billy's neck again, shifting to the side so Robin could get close to Billy too.