Does anybody know any good book series?

The Vampire Diaries. It's about two brothers in love with the same girl. It's really an epic love story. You should read it. And oh, it also has a TV Series, its on its 3rd season right now. Check it out. :)
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:)

The Melancholy of Haruhi Suzumiya, a series of light novels.
It's about a girl named Haruhi Suzumiya who has believed in the supernatural for her whole life, and a boy named Kyon who hasn't ever believed in anything. Kind of an atheist, you know? Anyways, the two wind up going to the same high school, and Kyon meets three people, Mikuru Asahina, Itsuki Koizumi, and Yuki Nagato. Yuki is an emotionless girl who was the sole member of the literary club, Itsuki transferred to the school in the middle of the year, and Mikuru is a cutesy member of the calligraphy club. Haruhi drags all four into a club that she forms called the SOS Brigade, and Kyon is told by the three oddballs(minus Haruhi) that Haruhi can change the world without even realizing what she's doing. However, if Haruhi should find this out, then she could destroy the world. Plus, whenever she gets bored of the real world, she creates another dimension parallel to our own called Closed Space, and it's Kyon's job to keep her entertained enough to prevent her from recreating the world.
It's really amazing! You should read it!

Pretty Little Liars series- (Even they're not like the show event wise, it still has the same plot) A crazy person sabotaging four teenage girls' lives

Confessions of Georgia Nicolson-Just a diary of a young girl go through life and boys. Note: Lots of british lingo that i didn't understand until i looked in her glossary in the back of each book.

Heather Wells Series-A former pop star solves crimes and mysteries in the dorm she works in. Its an Adult series.

The Mediator series-A Mediator (ghost hunter and sender to the after life) life through high school as she encounters ghosts and sends them where they need to go after life.

When Lighting Strikes series- When a young girl gets hit by lightning she can suddenly find anyone she sees a picture of after she sleeps for a night. Her life through high school trying to find people and the love of her life and ends after her first year of college.

Airhead series-When Em Watts' body dies after a horrible accident, her brain is put into the beautiful model Nikki Howard after her brain is destroyed from the same accident. The story revolves around Em juggling being a model, still going to school, and trying her best friend (and secret crush) to notice her again.

These are realistic fiction/fantasy/murder, they might not be the series' you like but they're just suggestions.

You'll be hocked on The Hunger Games and Evermore.

The Hunger Games by Suzanne Collins! Don't know if you've heard of it... my brother got me into it & it's basically awesome. there are three books, unfortunately I've only read the first, but I'm dyin to get my hands on the others. I was gonna try to read one chapter each night to make it last longer, but yeah that didn't happen. I read it in two days without putting it down to eat or sleep haha. I think they're workin on makin it a movie too

Anyway, there are many districts and every year one boy and one girl from each distict is picked to participate in the hunger games. So basically kids from the ages of 12 to 18 are put in an arena and they fight to the death til there's one person left standing, and that district is rewarded. the whole thing is broadcasted on television for the capitols amusement

no vampires --sorry, but it's pretty cool & there's a lil love story as well

The Intertwined series by Gena Showalter is really good

Well, since it sounds like you like fantasy (my favorite too) I would DEFINETLY recomend Harry Potter (best books I have ever read. My second favorite series is Septimus Heap (ots about a wizard too)

The Squire's Tale is a series that will have you mesmerized by the action. The Squire's Tale is based on the true story's of King Arthur's court with a modern twist. The author, Gerald Morris, perfectly captures the true nature of human beings and uses it to encaptivate his audiences attention.
Bloody Jack is also a good series. Written by L. A. Meyer, the stories will have you clutching you head and groaning at the misfortions of a common gutterrat find her way out to sea. I am so impatient for the new book to come out!!!!!!!

I don't know you have seemed to have listed all the good ones i would have reccomended (: have you read Blood Lines yet? If you don't mind Manga i would really reccomend Vampire Knight it's brilliant but the anime was kind of let down so yeah. Well any way good luck with finding some (:

oh yeah and try Vampire Kisses too.

The Anita Blake Vampire Hunter novels are amazing I love them. It's about a woman called Anita Blake obviously and she is a vampire executioner that hates vamps but a few books later falls in love with one. And another one. And another one. And a couple more with a few shapeshifters thrown in. But if you can't commit to a long series don't read them because there are like 23 with room to write more.