That reaction Neeraja is also because he feels betrayed that he felt that Radhika loves him and thinks she is his wife and will listen to him what ever he says and here she has broken his promise so all the more his shouting.
I agree with your betrayal part,but not about thinking her as his wife ...If so then how you will agree to marry your wife to another person whether he is your brother or your obligations to the family ...Yes i agree with that he denied the childhood marriage , not believing it ...Same would have been with Radhika if that Pandit had not emphasized the marriage part and so her belief in the marriage ...they both are right at their place ...Yes agree that he cares for her somewhere in heart but could not reciprocate her feelings because of his obligations ...As for his shouting at Radhika was his breaking point , knowing that Radhika told Rohan truth and because of that accident happened , and Rohan is near to death situation...when you are angry , you do not know what you are saying , as for repeatedly telling her hating her , trying to convince himself also...Why they want Radhika to enter as Rohan,s wife , why not Radhika come clean with Maheshwari about incomplete marriage ...Maheshwari agreeing because of her selfish reasons that as Rohan is not well she will come to RP house and when Rohan recovers , they will do the needful ...Then she does not have to stay as Rohan,s wife ...She will understand Dev,s helplessness because of obligations ...With her unconditional love will bring Dev out of his insecurities ...No need for fake husband / wife, which later on becomes problem , as she is already married to Dev and this time Dev also knows the truth...This was reason i wanted Creatives to think some fresh , original track ...As for Avinash and Rubina both have done the brilliant job, there is no doubt about that...