His love language is giving gifts and quality time, he always randomly compliments her so casually, even though he does all that with a stoic, cold, expressionless face. He doesn't look angry nor happy, no emotions at all...he usually kiss her on the cheek when he's about to go out and call her "darling", she never even once saw him smile, never, though he continues to slowly grow feelings for her..and he himself don't even know the reason why...