She was running away.
That's what she did, what she was good at.
Of course, it hadn't always been that way. Back when it was the four of them, before she had run out onto that patio deck and saw her best friend – sister – crumpled on the ground like a broken doll. Before her boyfriend of two years stopped acknowledging her existence. Before her father went after the richest man in Neptune and lost his position as Sheriff. Before it became normal to find empty liquor bottles strewn about the house with her mother passed out on the bed. Before that day when her mother just wasn't there anymore. Before waking up in that guest bedroom hurting and alone, searching for her underwear.
And as she stared into her boyfriend's eyes, at that moment she knew she was doing it again. It didn't matter that without her there he would continue to spiral into that black abyss; she was no longer strong enough to watch him do it. Reaching out to grasp his hands, she started to speak.
"I kept thinking that if I just stuck by you, that you'd get past this – this phase and you'd be you again."