I'm a RN fan and I was happy that raj doesn't love Ritu, but This is not the way to refuse the proposal!! He is a gentle man, but only to others. He always behaves so carelessly and rudely with Ritu. If not love, atleast friendship would have hurt him to see her expressions and her tears, but it hardly affected him!!
As Ritu said, If someday Naina too rejects him, will HE be able to accept it so easily??