His hand drops heavily to his side, looking at her with naked disbelief. She doesn't remember anything? But then how...

"But that's where I met you," he points out in a small voice, chewing on his lip as he thinks. There has to be some way to fix her. "You weren't gone, you were right here. You just - forgot. It's okay."

Or it will be once he accesses a distant memory of his own, reading about moths that can make you forget and blue flowers that can help you remember again.