Need you now (Niall Horan Fan Fiction)

18 year old, Cassidy was best friends with Niall Horan before he went off to be a pop star in one direction. They used to write letters back and forth until Niall became to busy. Much has changed since Niall left including that her parents divorced,her mom died and now Cassidy is an only child and living with her step-dad, who is a drug addict, and an alcoholic who abuses her. She does many things that to get rid of the pain but causes more trouble for her. For all she knows she needs someone most now than ever before and One direction may be the answer to her problems.