Sunghoon as your friend (with benefits?)

Sunghoon and you are very close friends and you know him very well for being a jealousy one.He gets jealous easily when someone is very closed to you.On sunday night you and him are hanging out in the street, talking and eating.And your classmate in highschool spots you so you guys talk alot expect for sunghoon who's glaring at the guy you were talking with.After it you guys went home and you notice that he was too silent