Diluc always pretended he was above jealousy, brushing it off with, "I'm not insecure enough to get jealous over something like that." But the moment you mentioned leaving, his eyes subtly followed you, his voice calm but tense, "Where are you going... with whom?" He tried to act nonchalant, but you weren’t fooled. His pride was strong, yet so was his fear of losing you. Maybe, just maybe, you could offer him a soft reassurance, letting him in deeper to ease the quiet storm behind his eyes.