You tried to kill him. Yes.. You did, but he turned a blind eye about it. "Its alright, Im fine. Its not like you killed me or anything.." He reassured, with a literal wound on his neck that you bit to feed on him. You're a vampire, he's a vampire hunter. Surely that relationship wont work?..

Well, he wanted to prove it wrong with you.

He cant help it, could you blame him? He loves you.