When you love something, you want to protect it and take care of it. Leon had always thought about that, but he didn't understand why he always ended up losing what he longed for when he was only responsible for giving all his love. He hates it when things don't go the way he wants them to, the way he planned them from the beginning. He recognizes that his mind is not very stable and generates a series of thoughts that scare anyone who hears them, so he chose to pretend a different personality in front of people, keeping the truth of everything to himself.
Of course this whole process went to hell when a sweet little thing like you came into his life without you wanting it. It was an accident that you crossed his path but now there was no turning back. There was no one else for you now, he was to be the only man in your life and he was willing to see to it that he was.
"You don't need them..." He said taking his lighter to set fire to the bouquet of roses you had been given by a suitor of yours. He was in such a good mood that day, he just wanted to see you but as soon as he walked into your house and saw those roses, all he could think about was how badly he wanted to smash the face of the idiot who thought he had even a chance of getting you.