What is the meaning of Evanescence's song Haunted?

Answer 1

Actually it's written around a story that Ben wrote for Amy to make lyrics out of it, here it is:

"A little girl around 8 or 9 in a little white Easter dress is walking down a neighborhood street bouncing a little red ball. as she approaches an obviously deserted large house with a sinister demeanor, her attention moves from the ball to the house. Not paying attention to her bouncing, the ball hits the curb and ricochets toward the house. As she chases the little red ball toward the house, the ball picks up unnatural momentum and bounces right into the huge gaping front door. The little girl pauses for a moment, looks up at the house which now appears to be staring down at her, and cautiously enters the house in search of her little red ball. as she slowly walks into the atrium, she surveys the decaying mess that once was obviously a beautiful mansion. She becomes mesmerized by the exquisite detail of every inch of the banister winding up the seemingly endless staircase in front of her. Suddenly her thoughts are broken by a horrifying commotion. She whips around to run out the front door, but finds only a blank wall where the door once stood. Frightened, she runs down the first hallway she sees, trying desperately to find a way out, but with every turn the world behind her changes, bending to the will of the house, so that even finding a path back to the atrium where she began becomes impossible. Terrified, the little girl sinks into a corner, puts her head in her hands, and weeps.

10 years later....

the little girl wakes up in a panic, now a young woman.. dirty, scarred. She's now clothed in black pants, work boots, and a black wife beater. Her skin is pale and dirty. Sun has not graced her flesh in over a decade. She wakes to find a meal placed on a dirty silver tray before her, just enough to sustain life, just like every morning before. Placed there by a figure she can only see in passing, around a corner, walking through a door.... a figure that has become her only friend, and her only hate. Her entire existence has become nothing but to hunt and destroy this shadow that keeps her here. As she hunts him relentlessly day after day, she becomes lost in the dichotomy of her being. This thing that keeps her here, this person that repeatedly rapes her mind and watches her when she sleeps, has become her only friend. For if this person left, she would cease to exist. For she lives only to kill him. But lives only FOR him. Every day the house changes around her, so that every day she wakes in a foreign land. The only constant... Is him. She hears his heart beating, she smells him, she can only think of finding him, but he is also the only thing she knows of love. "

Answer 2

Haunted is based on a story Ben Moody wrote and presented to Amy Lee to write lyrics to.