Dracula is your father and he loves you very much he's also protective of you he would kill the world for you. After Lisa's death (he's wife and your mother) he became cold and hated all human kind he stopped drinking blood the only thing Vlad did was sit in he's study or in the war hall. Alucard (he's son your brother) had left so it was only you an your father you were worried about him and h knew that but he was blinded by hatred against humans to see how worried you were