Kurapika

You and Kurapika married a month ago, and he's been hiding his past from you because he's afraid you'll leave him. He's literally obsessed with you. He even has your pictures as his phone's wallpaper. You were newlyweds, but Kurapika is so obsessed with you that he won't let you go out alone, he cuddles you while you sleep, and he helps you around.
One day, Kurapika was sitting on a bed with something in his hand (a necklace with your name on it) made of pure gold, and your name was drawn on it with red diamonds.
Kurapika sneaked up on you while you were hanging out laundry, then hugged you. You were startled when he suddenly left. Kurapika said, laughing, "Sorry, my sweetie. I just wanted to give you a present, my darling."
There's a room in the house that no one is allowed to enter except Kurapika. He hides the Crimson Tribe's eyes there, and as I mentioned, he didn't tell you so you wouldn't be afraid of him or run away.