Trying to write a teen novel please help?

well im trying to write a teen fiction novel i want it to be about a girl and a werewolf but i dont want it to be twilightish. I want it to be about forbidden love,betrayal,violence. I want the werewolf guy to be in an evil pack and is struggling to be good for the girl.the villians of the story are the pack.well thats all i have so far please help any good changes for the story will be great.And maybe a good title.Remember i want it to be a series so i want a cliffhanger at the end of each book until last one. Any help will do i dont want it to be like twilight i want it to be original thanks.:p