He lifted his hands, slowly because he was weak, he ran them both through Sherlock's hair and kept them there at the side of his head, holding it close.
"I don't want to leave you, not now, not ever, I can't even imagine-" he trailed off, his throat was closing up, he felt his eyelids flutter, trying to contain his feelings.
"You have no idea how much I wished for /this/ to happen, how much I pined for you, how much I want to hold you close and never let go..." he whispered, his thumb caressing along Sherlock's jaw, his movements delicate and adoring, his words and action speaking the truth in unison.
"I love you, Sherlock, and maybe it's the severity of the moment that makes everything feel so much more, but I wish I could be with you, I wish we could do all those things couples do," he had to take in a quick breath, a lone warm tear running down his cheek. "I don't want to die, you're the best thing that ever happened to me and I don't want to let you go, I do not want to leave you!"