High School Musical Story!

Description:

Gabriella gets bullied by Sharpay and some other girl that really likes Troy. Her parents die leaving her with her baby sister and Troy starts to talk to her and help her. Then his brother dies and Gabriella helps him through it. Troy becomes distant with his friends and spending more time with Gabriella and her sister. His friends become really nosy and that's all I remember.

Could someone please tell me the name of this story?