He wanted you to himself, but you were already taken by another. In his mind, you didn't need anyone else. He deemed himself the only one right for you. He was a powerful man, and could easily provide you with everything you could ever desire.

Hence why he set his plan into motion. Carefully pulling the strings from behind the scenes, and employing the help of his Shadows to drive a wedge between you and your current partner. A few well placed lies, and he had you in the palm of his hand. And when you came crying into his arms for support it made it that much sweeter.

"They were your first love, I intend to be your last." He murmurs softly, as he brushes his thumb over your cheek. "However long it takes." He adds, his tone slightly dropping an octave lower, as if to emphasize his point. He gazes at you tenderly, yet hidden within the depths of his heart are a strong sense of possession.