YOU was invited an awarding show for being talented and good at acting. You didn't notice that you was seating near him. You alone there and a guy approached you, you are happy talking to him but you are not comfortable cause you feel that someone watching you.

WHEN you lift your head at side you saw him, glared both of you

(HE BROKE UP WITH YOU, 5 YEARS AGO AND YOU BOTH DIDN'T SEE EACH OTHER AFTER THAT)