S.coups & Dino:
He'd be so sweet and concerned. As soon as he found out that you were jealous he'd immediately stop doing or talking to whoever made you jealous. Giving you all of his attention instead.
Jeonghan: & Woozi
He'd give you a soft smile and reassure you that you didn't have to be jealous. He'd hold your hand and give you a kiss on the forehead, assuring you that you didn't have to be jealous.
Mingyu & Hoshi:
He wouldn't understand why you were jealous at first. But, once he figured out why he try to playfully tease you about it. Though he'd later on tell you cheer up and that there's no reason to be jealous.
Wonwoo & Jun:
He would do subtle things to make you not feel jealous anymore. Like if he was talking to someone that made you feel jealous, he'd wrap his arm around you waist or whisper in your ear that you don't have to be jealous, smiling at you.
DK & Vernon:
He'd be a little clueless that you're jealous unless you told him that you were. He'd be smiling and joking with you as if nothing is wrong. But, when he realized that you were jealous he'd feel a little guilty and apologize. Promising to make up for it.
The8 & Joshua:
He'd feel slightly guilty when he realized that what he was doing was making you jealous. But, he'd smile at you and tell you that he'll try his best not to make you feel jealous next time.
Seungkwan:
He'd be quick to realize that sine thing was wrong and wouldn't stop asking you what was up until you told him. He'd smile slightly when he heard that you were jealous but only to apologize and pull you into a hug.