Destination Alien Bride by Dee J. Holmes

Journalist Brooklyn Tate came to this Caribbean island to blow the lid off a money laundering scheme at a destination wedding—instead, she discovers a bodysnatcher invasion straight from her nightmares and a hot alien warrior sent to stop them.
The interstellar hottie claims he wants a mate for life—but he also acts like humans are barely evolved gerbils. How can she possibly be this grumpy goliath’s match?
Khaz is one of only five surviving Apex’ir warriors. Locked inside his helmet, he’s determined to hunt down the parasitic aliens responsible for destroying his planet. He thought he’d cut down any humans necessary to kill his enemies, the Fever. Then he meets Brooklyn. The interfering female has his protective instincts firing, and his body aching for more. But can a human truly be his mate?
To claim an impossible future, Khaz must discover whether Brooklyn’s touch can free him from his helm. But their enemies are closing in. Will their passion set the stars alight, or will the Fever burn them up before they can unmask the heart of the infestation.