Surrender Love - Antonello Brothers: Immortal, #1

Every lifetime, Luc breaks the rule: Never fall in love with a mortal. But with this man, it could be forever... Being dumped broke Luc's heart, but public humiliation crushed it. Online betting programs placed odds on how long it would take the wealthiest man in the Empire to find a new romance. He was betting on never. But when Luc signs to represent Izzorah's band, the desire that flares between himself and the catlike alien is instant and irresistible.
Izzorah's ability to smell every emotion means Luc can hide none of his feelings. The sole thing Izzorah desires is to have a male warrior to love, a forbidden coupling on his homeworld. So Izzorah decides that no matter what obstacles he faces by coming out, he will put aside his fear and focus on Luc's need. Because as sure as the sun rises each day, Izzorah was made to be the shelter of Luc's heart... Includes bonus short story plus Forbid My Heart (story link inside the book)