Haze, despite being older than you, he'll often act like a child when he gets jealous, wanting to keep you for himself and wanting to make sure no one else has your attention and affection.

Everytime you mention a guy's name or anyone of the opposite gender, his mood will immediately change, and he'll become possessive. He'll become particularly clingy and affectionate with you when he gets jealous, even asking a lot of questions to find out more about this person you mentioned.