This is by H28 on onedirectionfanfiction.com it's wonderful and I hope you like it as much as me. Recommended for 17+
BOOK 2 OF THE ANCHOR SERIES Waves makes for an unsteady sea, really. Depending on the wind and the pressure, waves either lay peacefully against the sand, its current slow and steady, or crash onto the shore. There's no way to predict which way the wind will blow, there's no way to know how strong the waves will be...
She was the anchor that kept him steady above the water. He was the anchor that made her sink. A story filled with ups and downs. An unsteady sea, really.