Yours Until Dawn by Teresa Medeiros

Gabriel Fairchild’s valor during battle earns him the reputation of hero, but costs him both his sight and his hope for the future. Abandoned by the fiancée he adored, the man who once walked like a prince among London’s elite secludes himself in his family’s mansion, cursing his way through dark days and darker nights.
Prim nurse Samantha Wickersham arrives at Fairchild Park to find her new charge behaving more like a beast than a man. Determined to do her duty, she engages the arrogant earl in a battle of both wit and wills. Although he claims she doesn’t possess an ounce of womanly softness, she can feel his heart racing at her slightest touch. As Samantha begins to let the light back into Gabriel’s life and his heart, they both discover that some secrets — and some pleasures — are best explored in the dark …