Show him what hes missed but i can`t when hes not with me!

I told my friends what i thought about him ..
And they said don't get upset and stop caring about yourself ..
i said but i cant care about myself if i care about him and hes with her ..
They said show him what hes lost ..
So i simply said "how can i show him what hes missing when the thing he loved most is now fake" ..
So they said whats fake ..
MY SMILE!

Ive LOST HIM AND SHES GAINED HIM!
HOW CAN I POSSIBLY SMILE NOW?