you know him your whole life, since he saved your life. You showed your gratitute, by staying with him as his personal servant. But little did you know, that he kept a secret from you. That he was actually a Vampire. You didn't know that since now. You were pissed and wanted to go

He looks you leaving and wanted to chase after you, but couldn't control his bloodlust. It feels like, it was eating him alive and taking his willpower to resist.

"Please don't go..."