Rudra knows that he'd rammed into Gauri's shop and tried to talk to her several times but failed.
Yet, when they were on the boat together and she said that she'd lost something very precious the night before, Rudra didn't say a word....didn't he realise that it was the same girl?
Also, when he was running after her to get the box back, he may not have actually seen her face but surely he recognised her clothes....that yellow colour was hard to miss!!
Yet, when she came on board the boat, it was as though he'd never seen her before!
Weird!
Sorry if this has been mentioned before.