To wear your heart on your cheek is the opposite of wearing your heart on your sleeve.

A person who wears their heart on their cheek keeps their true emotions hidden, usually to keep themselves from getting hurt and/ or to hurt others.

This term is from the song 'How to be a Heartbreaker' by Marina and The Diamonds.
"Rule number three, wear your heart on your cheek
But never on your sleeve, unless you wanna taste defeat."
by Storm Kitsune September 17, 2014
Get the Heart on Your Cheek mug.