Dont say "Write about what you know" Trust me i know this topic in and out.

Hazel Austyn-Tyler always new she was sick, but no one else did. She told no one. Her sickness grows debilitating as she grows to close to a certain boy, Jordan Sanchez. Only to learn right before he has the courage to take the next to step, that she has Leukemia. She does anything, and everything, to hide it from everyone. She turns done the one she loves, and separates herself from everyone. Will Her life ever balance out? Or will her life hang in the Balance?
Dont worry, this is the raw(No Detail) Original idea! Just wondering how the actual idea is in general