Dick is struggling with his thoughts, he’s a vampire hunter and you are a vampire, but you’re injured and he can’t let you go. Dick knows you, you would never hurt someone, you’re not a bloodlust monster.

“Why aren’t you healing?” He is concerned, he knows that vampires have a superior healing factor. “How long has it been since you drank blood?” At this point he doesn’t care about the answer, he’s willing to let you feed on him is necessary.