Temple of Legends by Michael Long

Temple of Legends is told from the perspective of Mike, who is one of the top immortal assassins of the Temple of Legends. The story starts during the darkest part of Mike's life. As he is forced to face his own feelings and tries to battle through his depression. He has never felt so alone and even though it has been years since he broke up with Candice, the leader of the Temple of Legends, the one person he was forbidden to love. He finds himself at a crossroads in his long life as the events at Candice's wedding shape his future forever.