not necessarily
madly in love with each other doesn't mean you can ruin your own life just to show how great or how strong your love is.
Arjun follow his heart and his emotion..but i'm sure he has that brain to think how his decision can affect his life.
onir is purvi's husband..this is the man she will spend her whole life with..fall in love with him is normal.
why should she live in her past when she has a bright life in front of her?
she must move on. arjun included.