In "My BFF Became a Bully 'Coz I Look Way Younger," the protagonist faces the heartbreaking reality of losing her best friend to jealousy and insecurity. Known for her youthful appearance, she once enjoyed the perks of looking younger than her age, but it soon becomes a source of tension when her friend, feeling threatened and overshadowed, turns into a bully. As the protagonist grapples with the betrayal and confusion of their shifting dynamic, she navigates the emotional turmoil of their friendship. The story explores themes of envy, self-acceptance, and the complexities of growing apart, ultimately leading her to stand up for herself and seek healthier relationships that celebrate who she truly is, regardless of appearance.