Getting married was easy, but maintaining a marriage was difficult. That was why in the perfect order of the Alchemist society, marriage would only happen after they are sure of their partners. Some Alchemists engage in a relationship for hundreds of years before they finally decide to get married.
Ned and Portia were married after being in a relationship for nearly 200 years. Lauriel was about to marry his girlfriend, Luna, after they had been together for more than 150 years.
Unfortunately, Luna died in the war before they could formalize their marriage. Until now, Lauriel could not find the grave where she and the child in her womb were buried.
His great love for Luna made Lauriel unable to open his heart to other women even after nearly a century. He enjoyed his solitude in the world and only devoted his attention only to his goddaughter, Aleksis, and the animals in his conservation.