Lovesick: A Dark Romance - Cynthia A. Rodriguez

"Be careful with that one."
That's the first warning Abel Cartagena hears at Silverwing Mental Institution, where daydreams die and nightmares lie in their wake. What he doesn't expect is Rosamunde Montgomery-a breathtaking young woman with a violent streak and a taste for rebellion.
Abel's never been one to heed warnings, not even from the ghostly whispers of his late mother who sees Rose as nothing but trouble. But when Abel and Rose break out of Silverwing, he learns a harsh truth: freedom can be deadly for someone who can't stop killing.
Sometimes, the most beautiful roses are adorned with the sharpest thorns, and Abel is about to find out just how painful those thorns can be.