Sin on a Broken Heart

My broken heart.
Mikael betrayed me in the worst way. His attempt to take my life shattered my heart. Now I face a vampire's lifetime with a heart that I don't know can be pieced back together.
Leonidas, is a gang leader and dark knight, but his heart calls to mine.
For all that he is leader of the gang that murdered my abusive husband and the rest of the neighborhood, he wants to stand at my side as I face trying to save our world from destroying itself. Can I really trust him just because he wants to be with me now?
So many sins...
My world is crumbling even as I am working to save the rest of the world. How do I save the world with a broken heart?