I think Ruhi showing a side of every girl whether admit or not a side where she wants attention from the guy whom she loved and even if she did not had past with Armaan she might and/or would had fell for him, coz of the care he is giving her.
Ruhi could have at some point fell for Rohit too if he hadn’t left. Her main problem is the idea of leading a lonely life is making her obsessed with Armaan. She has been left alone by everyone she loved her poppy mother father was never there, then Armaan and Rohit too. She thinks she she will never get happiness in life. It’s her childhood that has made her this. Right now she has no idea of the fact that it’s because of her mistake her mother died. If she knew this since childhood her life would be more and more negative.
Life indeed gave her Rohit who was good for her, the mistake she did of not taking time to get married or the fact that time to forget Armaan.
The thing is what more is giving her issues is not that Abhira is his wife but her main issues is Armaan did not take their stand at the time they sorted out their misunderstanding. That is something making her more angry and remorseful
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