A love Immortal

Alexander, a warlock, is hundreds of years old. Throughout his life, he has only had one love though that love has come in many forms. Through his endless years of research on humans, he discovered that while the body may die, the soul goes on to be reborn, an endless cycle. Only a weapon of severe infernal, or demonic, alliance will be able to reap a human soul. When Alex meets a human with the telltale signs of his love, that jet-black hair and blue-green eyes, hes not sure what to make of it. Does he Dare hope he found his lost love? How far will he go to protect them, and who will he hurt indoing so?