Is this what humans call 'jealousy'?

Neuvillette didn't know why but he loathed it when he saw someone giving you a flower bouquet earlier. He was simply taking a walk outside Palais Mermonia yet his tranquility was broken by a deep unsettling feeling when he saw the sight.

"You look content," he points out when you walk into his office later that night with a relaxed expression.

He doesn't know why he's feeling this way. He should be happy someone is courting his friend, no?