Infinite2 (Infinite, #10)

William Chanokh is immortal...and he's trapped on the Galahad, an interstellar starship on a never-ending journey through open space.

His only companions are Capria--mortal and in cryo-sleep--and Gal, an artificial intelligence, and the love of his life, with whom he spends every waking moment in the 'Great Escape,' a virtual paradise. After untold years living countless lives, Gal begins acting strange. Possessive. Violent. Paranoid.

Positive that something in the real world is causing her to malfunction, Will attempts to leave the Great Escape, but he finds himself a prisoner. Guided by a voice from reality, he is thrust into a series of torturous narratives, each one designed to break his will and keep him trapped in virtual reality.

Betrayed by his digital love, his long-term memory overwritten, and enduring violent manipulation, Will painfully peels back layers of simulation, fighting to reach reality 1.0--where the nightmares are real.

Maybe.