"I love you" sounds different to me now.
It used to warm my heart - now it leaves me cold.
It was once an expression of you wanting me in your life.
It was my everything. It was the highlight of my day.
As it became a drug to me, you took advantage of your position as a  dealer.
Through these words you were able to control me. I was everything but resistant.
You have ruined love to me, how could I ever forgive that?

Simple enough.
One more "I love you" will do.