Well, I'll give you some of my favorites.
- Vampire Academy series by Richelle Mead (honestly, not as crappy as the title might lead you to believe. It's one of my top favs actually XD)
- Vampire Diaries series by L. J. Smith
- Night World series by L. J. Smith (soo good.)
- House of Night series by P. C and Kristen Cast (good, but more to the older teens because it has cursing and so on)
- Mortal Instruments trilogy by Cassandra Clare (MUST READ. It might seem a tad wrong in the first book, but trust me, it is awesome, brilliant, amazing and any other synonym you can think up of. Seriously, read the three books in this trilogy)
Not sure if you would like these, since they're mostly action with romance thrown in as well.
- Stravaganza series by Mary Hoffman (God, this story is brilliant. It's more of an Alternate Universe story though)
- Wicked Lovely (It's about fairies, but not the sweet childish ones you might think of. These fairies are deadly. You might not like it though, your choice.)
- Maximum Ride series by James Patterson (this is packed with action, but has a dash of cute romance in it as well)
Well, that's all I can think of right now xP Hope you like these books!