Ah, the smirk. When your guy smirks in a completely inappropriate context—like when you’re crying or shocked or distraught—that’s a smoking gun.
It’s a clear tell that he’s getting pleasure from your pain. He likes seeing you weak, broken, confused, horrified, or at your wit’s end.
He may also smirk when he’s lying to you and he sees you believe him. This is called “duping delight.”