Who's Kissing You Tonight

Oh it's the jealousy that's hurting me
So why can't I let it be, why can't I just let go?
But the thought of you somewhere with someone else
Doing what we used to do, feeling what we felt
Oh I know it's really over and you're never coming back
And there's no way that I can make it right
Still I wonder, oh I wonder, oh baby I can't but wonder
Who's kissing you tonight?