Don't you think shivaay was highlighting that he is jealous in shivru scene? If anybody is jealous they will try to hide na? Not seen episode. Just read updates.
Yeah he was jealous and seething with anger.
Rudra told him that they r faking it and SHivaay should not give them the satisfaction of reacting to it,
So Shivaay decided he will (act) be calm and composed in front of them