When Yash and Arti got married,Arti was obsessed with Ansh and it was not until he got kidnaped and Yash has to save him by playing his life did Arti realise how important Yash was for her and her son.
It was the fear of loosing Yash that got Arti to snap out of her obsession and accept that she was indeed in love with Yash.Even when Yash asked her to sign the divorce papers she wanted to go home with him as his wife and prove herself good for his family.She found a very strong support system in Yash and her trust was restored in relationships.
Where as Yash also realised that Arti is important to him and choose to save Arti instead of His dead wifes meterial memories.
The fear of loosing Aarti got Yash also to snap out of his obsession and it was a big shock for him because he was in that state for four long years.
Yash on the other hand is very introvert and shy person and he did not know how to deal with the situation.He did not know how to justify the same relationship with two different people.He got so confused and scared that he is willing to let go both of them so that he can at least live in peace where he does not have to choose any one, because choosing one will mean he is unfaithful to the other.
And poor Arti wants to help but does not know what hit her and from which direction..