If Kartik made the decision to marry Survi in the manadap,why is he feeling guilty about it? It is not like Aniket is blaming Kartik for betraying him, Anikets fully blames his mother.
Yes Kartik cares for his brother but Survi is his WIFE now, and the decision to make Survi his wife was his, Survi didn't come running to him for help. It was Kartiks decision to marry Survi. So why he does not know whether he did the right thing or not by marrying Survi.
My answer to him would have been, you made the decision now stick to it. Why does he want his marriage life to revolve around Aniket ?