Dev feels a connect with Durga. A kind of intimacy you can say. Even Neil could feel the comfort level Dev and Durga were feeling with each other when Durga asked him to play the song.
He cannot place the connect and on most occasion he doesn't realize Durga looks away when he talks about Nithya.
He was the one who really felt uncomfortable by her engagement. And he will be the one who will be feeling bad when Durga pronounces her love for Shaurya. He will feel bad and he may be surprised at that feelingđ