Fallen Warrior by Aliya DalRae

Martin is a Soldier in the Vampire Legion. His aristocratic blood sets him apart from his fellow fighters, making his goal to achieve the highest rank of Warrior all the more complex. Through blood and sweat, he’s caught the Warlord’s attention, placing his objective firmly in reach. However, another Warrior has caught his eye, and Martin is determined to prove himself to this male above all others. The heart wants what it wants, and Martin will sacrifice everything to make Merlin his.
Forced into hiding by an enemy who would see him dead, Merlin has led an unassuming life for more than a thousand years. Then the Soldier, Martin, walked into his life, and now Merlin’s sleep is plagued with nightmares that threaten not only him, but the Legion family he would die to protect. Giving in to his desire could conceivably destroy everyone he loves. Not giving in will most certainly destroy what’s left of his soul.