try lj smith's books. theirs vampire diaries which is better than twilight. it's actually older (1990s) but its sooo good. it's being made into a tv show in the fall. also, nightworld is amazing and so is secret circle.
others:
ann rice's books (try interview with a vampire - its really good)
vampire hunter d
dracula - its old but it's a classic and its good
vampire acadamy
vampire kisses
dead until dark (blue bloods series)
stookie stackhouse's books
evernight
maximum ride - ITS SOOO GOOD!! i recommend it to everyone for it is way better than twilight!!!
wake and fade by lisa mcmann - SOOO GOOD it's my second favorite next to maximum ride series

and i CANNOT WAIT until gone comes out next year

it's a lil innapropriate i mean like drugs, sex, curse words etc but besides that its amazing!
evermore and blue moon (it's about immortals but it's amazing - i'm reading blue moon. blue moon came out yesterday

)
daniel x series
wicked lovely series
the mortal instruments series
the host by stephenie meyer (i think it's better than twilight!)