Him living alone for many years without any love can just forget about all the hurt and pain he felt after his fathers death?!
Remember he came for revenge but feel in love that doesn't mean he forgot about his fathers death and what he came for!!
It's true Kalpi changed him! But she just changed his way of thinking by making him understand the way she thinks and what she believes in!
He is the same person!
Or do you believe that he is actually the shrewd business man who trust no one and cares for only those who he has feelings for?! A man that came to seek revenge and will do anything to avenge his fathers death?! Anything!!