[RCF]

Ask him to try to express love and at the same time going out with another man is wrong to me.

Agreed partially but she already mentioned to him if she ever felt love from she would return back and he has to accept her with her affair with Tharun too just like she accepted him with Anjali, though her logic is wrong morally compared to Jay. Jay and Anjali were a thing when they were friends but this is different so definitely a mistake if she ever want to be with Jay it would be too difficult to reconcile at later point. 

Jay moving on would be the best thing for Nikita to see the reality. 

~RCF