MY FRIEND (EN)EMY

I have a freind and his name is death we've made a deal or a secret if you wish, he'll give me freedom he'll give me life as long as no one knows our deal until my dying last breath. So he leaves me to think about this till the next night, he returns and finds me smiling in a chair with a gun aimed at him and and another in my face....BAM!!! I wonder who took their dying last breath.