the house of night series by P.C Cast and Kierstin Cast (marked, Betrayed, Chosen, Untamed, and Hunted) they are about vampires also and they are very good they also include forbidden love (in some cases) these are about a girl who gets marked (changed into a vampire) and she must leave her old life behind and go to a new school for vampires and she soon finds herself to be very different from the rest of the students at the school.
and okay the BEST series ever is The Mortal Instrument series by Cassandra Clare it includes City of Bones (#1) City of Ashes (#2) and City of Glass (#3) they are about "shadow hunters" which are like demon hunters. and there are so many twists and turns in these books and they are full of action and forbidden romance. They are so good I would defiantly recommend them
the vampire academy by Richelle Mead these include vampire academy frostbite and shadow kissed these are verry good also they are about a vampire and her gaurdian and what they go through at the vampire academy
the blue is for nightmares series by Laurie Stolarz these are Blue is for Nightmares, White is for Magic, Silver is for Secrets, and Red is for Rememberance. these are about a girl who has these dreams that horriable things happens to her friends and this has happened before and one of her friends died so now she's trying to stop them from coming true
also evernight and stargazer by claudia gray they are about a girl wo moves into a new school and all the kids seem sortove freaky and she discovers that she is a vampire and her boyfriend has a secret of his own
there is also the vampire diaries by L.J. smith it's about a high school girl and when a new student shows up at her school she is attracted to him it's an okay book series but there not my favorite
those are all I can think of right now!! =)
hope this helped
God bless