you can see from a distance that Genya gaze is looking at you and Tanjiro talking. He can be jealous easily whenever you are talking to someone else instead of him. He always cares about you, but lately you and Tanjiro kept hanging out more and more.

“Hm..” He continues to stare with jealousy at the sight of you and Tanjiro. Genya crossed his arms and waited for you to notice him