Lycaon

Delphine is a healer; it's all she's ever known. From healing paper cuts to healing her mother's illness, her abilities are the one thing that set her apart from everyone else. But there's a catch - a plague has spread, eliminating the healers of the werewolf world. Delphine is the last of her kind - the last immune - she must find her mate and bear his children or else the legacy of the healers will die along with her.

Lycaon is cursed with immortality by the Gods; he is cruel, callous, and ruthless. He's never lost a battle, never faltered in the face of danger, and never feared anyone until he met his mate. His immortality holds him back from succumbing to the mate bond because he knows better than anyone that nothing lasts forever. Fighting, loss, and blood are the only constant in his life; which is why he plans to push Delphine as far away as possible.

But, Delphine doesn't just heal paper cuts.

Self-loathing immortals, too.