The thing is SR told him, and also invited him and they want him to apart of their happiness as Armaan is apart of their lives
They both expected Armaan to be there, Armaan sees them most of the time, as a friend and a big bro to Sid - Sid expected him there, and the moment Shilpa had to be the one to tell where Armaan is, Sid understood why Armaan cant make it, he isnt even questioning how can Armaan to do this etc, no - Sid got itNow all Sid has to do is tell Ridz coz he knows why Armaan isnt here and the reason, he knows it and is waiting to tell RidzSee the difference is Sid knows, thats why its important to tell her coz he knows - her belief on honesty and Sid's belief on honesty is hereHe is in-between her happiness and the truth, he doesnt want Ridz glow and happiness to fade and he knows he cant keep the truth any longer, coz they are open with everything and honestAnd yes i do think Armaan should be the one telling SR he cant make, knowing they would expect him there, coz they care for him and is apart of their lives - if he told them, they would understandAs for Ridz comparing Sid and Armaan, she did is fondly, just see her facial expressionsBut she summed it up right, how Sid and Armaan see the truth and how they handle itShe said what Sid does with the truth, sees the right and wrong and find the solution to do the right thing, and its never hiding it from anyone esp her (and thats what Sid has been doing in the last two episodes)Whilst with Armaan he tries to find way of hiding the truth, and running away from it
Armaan is part of Sid and Riddhima's life my point exactly he should tell them he can't come I mean Sid got it and I am sure Riddhima would as well. It would be great to have Armaan there and get he has his own feelings and he shouldn't be forced to be there but I am sure if he told them then it wouldn't be eating Sid up to tell Riddhima because it isn't Sid's responsibilty but because Armaan didn't have the guts to tell them it has become Sid's responsibilty which I think is unfair and it is testing his honesty in a way it should never be tested!