Diana's pained expression as Thor told his story made him ache for her. Her empathy astounded him, but all the same, he'd never wanted her to feel what he felt. It wasn't right for anyone, and he'd dealt with it in his own way. It was largely irrelevant now that Thor's own way ended up being five years of pizza, Fortnite, and drinking. When Diana held Thor's hand where it was, he marveled at the gesture, the simple intimacy of it long lost to him.
Diana's words nearly brought him to his knees when she did speak, though. How was Thor even supposed to respond to that? His face got hot again, surely red and flushed, and all he could do was nod. The words wouldn't come, not that he had an appropriate response anyway. His hand, still threaded in hers, squeezed gently one last time as he did, and he just reveled in the sensation of knowing someone was here who finally understood.