The Question and Answer section for The Fault in Our Stars is a great resource to ask questions, find answers, and discuss the novel.
From the text:
I hadn't been in proper school in three years. My parents were my two best friends. My third best friend was an author who did not know I existed.
This is asking for your opinion rather than mine. I don't know what impression you were forming.
Yes, according to Hazel.... ignorance is bliss.