who are you

who are you, forgive me, i'm hopeless with faces, but you sing with a voice like i know you, and suddenly i start to see, so perfect and complex, who are you, 'cause just with a smile i'm around you, and i'll try my best like i know you, who are you, who are you to me, who are you, stood next to my friends, i should know you, but given my look, i run without thinking, and fall without blinking, and i, and i'm forced to bare witness, like a fool that's just waiting in line, who are you, 'cause i can't quite think like i used to, and given my look, i run without thinking, and fall without blinking, who are you, 'cause just with a smile i'm around you, and i'll try my best like i know you, who are you, who are you to me