It is just my opinion not to hurt the feelings of any one or against anyone.
Indira and Rishi's love is not love at first sight from Indira's point of view but may be from Rishi's point of view.
She gradually started liking Rishi… I guess there is slight difference between like and love…So she may express her love in a different way. More than that as she is not a romantic type, she feels some kind of hesitation in expressing her love. She treats/feels Rishi more as a friend rather than a lover or husband…I guess.
A friend is a gift you give yourself.....Friendship is a special kind of love.