If you liked the Twilight books, you might like these:
House of Night Series by P.C. and Kristen Cast
The Immortal Series by Alyson Noel
Need by Carrie Jones
Morganville Vampires by Rachel Caine
Mortal Instruments by Cassandra Clare
Vampire Academy by Richelle Mead
The Wolves of Mercy Falls Maggie Stiefvater
House of Night Series by P.C. and Kristen Cast
The Immortal Series by Alyson Noel
Need by Carrie Jones
Morganville Vampires by Rachel Caine
Mortal Instruments by Cassandra Clare
Vampire Academy by Richelle Mead
The Wolves of Mercy Falls Maggie Stiefvater