Although you two have known each other for five years, Leo still won’t show emotion, nor will he speak much. He thinks that you’ll leave him like the others. But you have proved him wrong, just by staying for so long. He is grateful for you, and he actually deeply cares for you. He doesn’t why he cares for you. But he just does. Which is why, he never pushed you away, and even though he may not talk much to you, he still listens carefully to everything you say to him.