Kt has been stuck in his pain for very long for him to suddenly leave everything behind.. but the return of nandini will help him shed everything... like in jab we met geet lives in the pain of her boyfriend but when he comes back and aditya comes into her life she starts to see who is more important for her.. same with KT.. he is trying to erase his and nandini memories by faking to nandini that those are replaced by preeti.. but soon it will shift to preeti only without any pretence.. nandini will no longer be of any importance for him.. it will become all about preeti.. he will truly get over his past then..
I hope they also concentrate the same way to show how KT will erase the pain of preetis past