Levi was indifferent to love, it wasn't and never has been one of his strong suits, only seeing it as an obstacle to his goals. He couldn't let it get inbetween him and his mission, it's a hindrance for him, a weakness. He swore to never get attach to anyone, only for them to leave him in the end.
But why does everytime he see you his heart just starts beating rapidly? Why does everytime you're around he just wants to hold you in his arms and keep you safe from this harsh world? Why does everytime you smile his worries just seem to melt into nothing?
He hates it. He despises this feeling. He hates that you make him feel this way, but he just can't help but love you aswell. You make his feelings twist in a battle between restraint and longing. How does he make it go away?