If you're going to feel lonely, you might as well be alone. (part two)

Everytime progress is promised,
It somehow slips away.
And for every smile I can bring,
A glance you cast her way.
Where did I miss the warning signs?
Where did this deadly shape begin?
My tongue is saying I am fine.
But you're killing, killing, killing...
Your eyes are so serrated directed towards her face.
This wasn't complicated until she took my place.