The Light Within Me by Carly Fall

As a shy, awkward social misfit, Abby has gone her whole life feeling as though she’s different from everyone else and she simply doesn’t fit in well with society as a whole. She longs to feel a real connection with someone, and she finally does when she meets Noah. Unbeknownst to Abby, Noah is from another world, here to hunt down the evil of his people that has been unleashed on Earth, and he’s been at it a very long time.
Noah’s certain he isn’t going to be able to return home, and anger and the need for revenge are his constant companions. His focus has been eradicating the evil and making them pay for taking his life on his world away from him.
When Abby and Noah meet, there is an electric sexual attraction between them that can’t be denied by either of them, an attraction that Noah tries to fight so he can keep his focus on his mission. But when Abby gets dragged into the evil from Noah’s world, he realizes that maybe with Abby he can find a home here on Earth…if he can save her in time.