He has been doing this for his family leaving his wish behind.. Now with Priya also he is developing the same feeling...
The way he was trying to convince in "Sobha" ceremony was nice. He does not want hurt her actually . Like he told Vikram "Bichari Priya ka kya haal ho raha hoga". There si a feeling of togetherness is developing unconsciously between them.
Of course one can say .. Priya is Kartik's sister so Ram behaves with her properly
but see Ram;s comfirt level with Vikram and his wife .. it is very sweet
I also lliked the the Priya said to her Naani.. " Mai Unko Manaa loongi "