Harry: He will grab your hand and try to walk you away from whoever is making him jealous.

Ron: Ron will make indignant huffs and groan loudly until you look at him.

Draco: whenever Draco gets jealous he isn't afraid to show it. He will grab you and kiss you right in front whoever was making him jealous.

Fred: Fred doesn't usually get jealous but when he does he will come up behind you, wrap his arms around your waist and rest his head on your shoulder.

George: George will simply pick you up and carry you off if he gets to jealous.

Neville: Neville gets too shy so, he will wait for you to finish your conversation and pull you away.

Seamus: Seamus will glare at whoever is making him jealous and cough really loudly.

Young James: If James gets jealous he will come up behind you, wrap his arms around his waist and kiss your neck.

Young Sirius: Sirius doesn't get jealous. He trusts you.

Young Remus: Whenever Remus was jealous he would sulk in a corner and ignore everyone until you came and talked to him.

Newt: He would gently tug at the sleeve of your robe and try to pull you away.