Doubt on his Honesty
Riddhima had doubt on Vansh's honesty even when he showed his love for Sejal and so then how can she even trust him while he was proposing her?
Howver, Vansh had no doubt on Riddhima's dishonesty and her honesty in sense of love and devotion for Kevin.
And Riddhima had said this involving that girl, "If they were in reality entrusted to you, then why didn't you keep her trust? What about the seed of love according to you?"
Vansh by no means had any girl in his life whom he was much serious with, in fact, aside from this, he articulated that there was no girl in his life which he also referred to as the purpose of his peace until he met Riddhima.
Kevin known as Riddhima to be his love first to get to Sejal, but then he was stopped via Vansh because he did not choose that Riddhima would be harmed in any way.
Vansh is not telling this to Riddhima, however Kevin will himself inform this to Riddhima and Vansh is additionally waiting for that time.