Answer:
The Twilight Saga by Stephenie Meyer:
Twilight, New Moon, Eclipse, Breaking Dawn
Kelley Armstrong's Darkest Powers series: The Summoning, The Awakening, The Reckoning
Ellen Schreiber's "Vampire Kisses" series: Vampire Kisses, Kissing Coffins, Vampireville, Dance with a Vampire, Coffin Culb, Blood Relatives
The Silver Kiss
Kristen Cast and PC Cast's House of Night series (beginning with "MARKED")
A 16 yr old high-school girl lives in a world mixed with vampires and humans living peacefully. When she gets marked she must go to this special boarding school for vampires or she dies.- very good.
Rachel Caine's Morganville Vampire series- (beginnign with "GLASS HOUSE")
A 16 yr old girl lives in Morganville- Texas goes to College early. Lots of people in town know about vampires, she doesn't. Gets beat up in her dorm by a girl and moves to glass house. Can't really tell you any more but one of the best series I've ever read!
Vampire academy series by Richelle Mead (beginning with "Vamprie Academy) Fantastic series. Confusing to tell you though just Google it.
Buffy the Vampire Slayer series. Based on the tv show which is also very good.
LA Weatherly's book "Angel" (sequel "Angel Fire").
L.J.Smith's Night World series: Series about vampires, werewolves and witches.
Dark Powers, also by L.J.Smith.
5 teenagers have special powers and are sent to a boarding school to learn to control them. -VERY GOOD.
'Fallen' by Lauren Kate (sequel "Torment")
About a fallen angel. Not as good as "Hush, hush", but still good.
'Hush, hush' by Becca Fitzpatrick. (sequels "Crescendo" and "Silence")
About a fallen angel. Amazing series! Better than Fallen.
Maggie Stiefvater's werewolf series: Shiver, Linger, Forever
Meg Cabot's The Mediator series.
About a girl who can see ghosts and falls in love with one.