The break-up between you and Nathan was far from pretty. It was messy and chaotic. He was always too focused on his own life, he didn't pay enough attention to you, making you break-up with him.
But he wasn't about to let you go so easily. You were his. His love. His partner.
He always kept tabs on you. Taking note of the people you interact with, paying close attention to what you're doing; usually by stalking through your social media. He knew it was wrong, but he couldn't stop.
So when he saw you being dropped off at your house by another man, he was furious. The second the other man was gone, he was speedwalking over to your door, knocking down on it.
"Who was that, hm?" He asked as soon as you opened the door. "Bet that fuckin' asshat doesn't even know how to please you."