Liane Moriarty said this quote

It was strange, because she always felt that she hid herself from Erika, that she was more 'herself' with her 'true' friends, where the friendship flowed in an ordinary, uncomplicated, grown-up fashion (emails, phone calls, drinks, dinners, banter and jokes that everyone got), but right now it felt like none of those friends knew her the raw, ugly, childish, basic way that Erika did.