How can i get my girlfriend to turn into a vampire or atleast like em?

i am a vampire and she already told me she likes me in the past but lately shes been hanging out with this werewolf wannabee kid and i feel lke she might be falling for him. wat can i do to get her back. should i beat up the werewolf kid?? hes kinda buff but i got speed on him. any advice is appreciated. serious answers only please.