Fated to the Traitor by Georgette St. Clair

Welcome to the Chaos Realm …

Heath floated in a dangerous place no one visited voluntarily. Broken, his memories collided and he was uncertain he’d ever be free again. Forced to traverse the murky landscape, he began to question everything—his reality, his past, and his future.
Yet an unerring tether drove him to the center of the abyss.

The light …
She resided there. Her voice saved him. Her soul had claimed his before he realized it. Asherah of the Mound, the Fae princess who had disappeared long ago, should have been dead.
And so should he.

It seemed they both had defied the Fates …
The Fates wanted him to fail and disappear into nothingness. Hearts can’t be contained, though, and he’d be damned if they took another thing from him. Ever. Heath would blow the Chaos Realm sky high if that’s what it took because Asherah was worth it.
And she was starting to make him believe he was too.