Newt:
He gets jealous of Thomas when you hang out with him. Thomas is your best friend and you two love playing pranks. Newt doesn't admit it but you can tell when's he's jealous because he gets all quiet and just gets this sad look in his eyes. You always reassure him though, with lots of hugs and kisses, that he has no reason to be jealous
Thomas:
Believe it or not Thomas gets jealous of Gally. You two work together so of course you spend lots of time together. Alby has been getting mad at Thomas for shirking his running duties so he doesn't hang around as much. When he gets jealous his temper is short and he usually just hangs in the Deadheads until he's calmed down.
Minho:
Minho gets jealous of all the other Gladers. You're a Medjack so if someone gets hurt you have to help them. That doesn't stop Minho from getting frustrated. Yeah the other Gladers might flirt but Minho is the only boy for you and none of these shanks are going to change that.