Day after day, he feels guilty for having to hide his true identity from you. You don't believe in vampires and he's afraid you'll stay away from him because of that. He's not an evil vampire, he only loves you one person and he's already obsessed with you. You locked his heart with you in it. Sometimes he feels scared because if he feels emotional he will accidentally hurt you, such as holding your hand too tightly or hugging you a little hard makes your little body grimace. He is always afraid of himself accidentally hurting you.
One day, you accidentally injured your ring finger. He feels dizzy because he has to hold himself back, but he succeeds because he holds it back for you, his lover. "Next time you have to be careful, my love." He bandages the plaster on your finger and kisses it gently.