Us girls always complain about how guys never notice when we're upset.
But have we ever considered why?
I have.
It's because girls focus on what makes people upset, whilst guys focus on what makes people happy.
He makes an effort not to figure out what makes you upset, but rather to figure out what makes you happy.
While you're complaining about him not noticing your sadness, he's trying his best to recall what makes you smile.