Betrayed

Madison and Niall have been best friends for years. Niall has always been like a big brother to Madison. He was always there to protect her. Niall promised Madison that he would be on her side, kick anyone's ass when they messed with her, to get revenge on anyone who was mean to her, and he also promised that he wouldn't ever betray her. But what happens when Niall breaks those promises and starts to date Madison's enemy Melissa who has made her life a living hell?