do u know any good vampire anime?

Well, it's not a romantic Shoujo (it's more of a horror/mystery) but you can try Shiki.

First Thing that came to my head was the Anime:
" Dance In The Vampire Bund "
There are also Werewolfs and other creatures I hope that's ok

Just the Best one ever...HELLSING ULTIMATE!!!! \M/ \M/

oh and another good one is Rosario Vampire

Here's a preview of episode one unfortunate this user only has part one of this episode YouTube has taken down all the others.

Vampir Knight and Rosario Vampire!! ~ssu!!

i see you've already watched vampire knight... great anime
Rosario Vampire is a good one too

There's always Moon Phase if you like vampires who wear cat ears.