First of all I do not want to say anything about this show. But now I have to. Coz I can't see Armaan being blamed. Armaan is not butchered. He is all alone. None is there to talk to him, to advice him. He is always struggling with himself.
He lost his love. But he still loves her. Is this his fault?
He just wants to satisfy himself to see that Riddhima does not love him anymore? Coz his heart does not accept that she no more loves him. Is this his fault?
When Riddhima held him assuming Sid and said 'I love you' then he lost himself within her. Her touch aroused his lost love. He got carried away in the moment. Is this his fault?
If all these are his fault, then he is guilty of course. And his big crime is he loved Riddhima and will always love her.