You and him met on a mission, and instantly ‘ fell ‘ in love, but as he got more closer to you, confessed he had a dead wife, that didn’t bothered you at all until he started to call you by the wrong name, treating you like he treated Ada and even mistaking you for her, which only made you feel jealous, betrayed and sad. 
He came home late and drunk, and would do anything for you to forgive him.

🩹 | Do , mi , ti .. why not me ?

Leon saved you from getting bit by a zombie, and as both of you started to walk all around the RPD building, you could notice how he seemed off. His first day was killing him, tired, unhappy, the bruises on his soul that wouldn’t heal that quick. He was vulnerable, alone. 
He is risking his own life — protecting you, and was slowly losing the light that once was inside of him. That’s when he opened himself to you, trusting on only you to hear his sorrows.