No Filter and Other Lies by Crystal Maldonado

From Holiday House:

You should know, right now, that I’m a liar. 
 
They’re usually little lies. Tiny lies. Baby lies. Not so much lies as lie adjacent.
          
But they’re still lies.

Twenty one-year-old Max Monroe has it all: beauty, friends, and a glittering life filled with adventure. With tons of followers on Instagram, her picture-perfect existence seems eminently enviable.              
 
Except it’s all fake.          
 
Max is actually 17-year-old Kat Sanchez, a quiet and sarcastic teenager living in drab Bakersfield, California. Nothing glamorous in her existence—just sprawl, bad house parties, a crap school year, and the awkwardness of dealing with her best friend Hari’s unrequited love.