Through Darkness (Second Edition) - Reeves Jenna-Lee

Life has been good for high school senior Stephanie Martin, but when she finds out her boyfriend has been cheating on her, her world begins to fall apart. Plagued with the dark secret of her best friend's subsequent death, Stephanie makes an enemy of her ex-boyfriend when she humiliates him by rejecting his overtures. Suddenly she finds herself bereft of friends, expelled from school, and spending a lot of time in the rundown, old house she shares with her mom - where she senses another unseen presence. When she tries to find out who lived in the house previously, the police refuse to reveal what happened - but something most definitely did.