The Fault in Our Stars Chapter 21 Summary

Augustus dies, and Hazel isn't there to witness it.
She gets a phone call in the middle of the night from his mother and knows immediately that it's over.
Her parents are terrified and filled with grief and don't know how to make her feel better at all.
Hazel calls Augustus's phone. She also goes onto his Facebook page, where she sees all these condolence posts about him.
She's annoyed by all the people who said that he'd live forever in their hearts.
She writes a post about how he died of the "universe's need to make and unmake all that is possible." No one responds.
She goes into the living room to watch TV, and her parents try to make her feel better.