Bloodflower by K. J. Harrowick

Born into a world of futuristic technology, ecologist Jàden Ravenscraft wields starship fuel like magic but she’s losing control of her power. Marked as a dangerous weapon, she’s trapped in hypersleep for 4000 years and wakes in the backwoods of a terraformed moon. Now she’s determined to find her reincarnated lover and escape back to the stars before her captor discovers she’s no longer asleep.

Because one life is not the end.

The man she loves has lived more than twenty lives without her, and Jàden’s alone in a world of swords and sorcery. When exiled prison guard Captain Jon Ayers shields her from an attack, Jàden seizes the chance for safety and human connection. Using her magic, she ties her energy to Jon, forging a bond to keep him close to her side.

But Jon is hunted by mercenaries for the pendant he carries, a key to the gateway between worlds, and their bond stirs a desire neither can ignore. When the jackass who trapped her in the future ambushes them at sea, Jàden will be faced with the hardest choice of her life between Jon and her reincarnated ex. Saving one lover will destroy the other, and the wrong choice will land her in chains she can never escape.