The little hint of contact of Cas's hand had Peter leaning in, seeking the comfort. Cas's little declaration made something hot flicker in his chest. He couldn't say it was hope. It was still only words. He trusted Cas, but trust didn't equal truth, and these were dangerous claims.
Still. His friend seemed driven. Peter saw it daily, how much Castiel cared about the people here, ready to do whatever it took to see this war ended and everyone saved. If anyone could save them, surely Cas was the one. But Peter didn't dare let his hopes rise; he'd been burned too often and too badly.
His eyes dropped from Cas's, drifting shut in exhaustion. "I want you to be right," he whispered. "More than anything."