Should i write a book about this?

i've always loved to write and i think i'm pretty good at it. What do you think about a book about a flawless girl. Her life was perfect, she was 14 and drop deas gorgeous. She was rich... her dad was a ceo. She had a pool, a mansion, a dance studio in her house. she was a cheerleader and ballet dancer. Then one day she hit her head when falling in a back tuck in cheerleading and got a concussion. After 2 months of no physical activity she gained 5 lbs... which wasn't really that bad but it completley screwed up her self image. Despite her perfect body she never could see that she was beautiful herself and the five pounds just pushed her over the edge... especially since she got a concussion she couldn't do anything about it. When she was permitted to go back to dance and cheer she didn't feel perfect anymore and she started dieting. She turned into a little game for herself about how little calories she could consume in a day until it was practically nothing. She went into a full blown case of anorexia. I'll go into some detail about that in the book then have her recover. I just thought of the idea because my best friend is a questionable anorexic.