Her love : Doing things beyond limit.
We all have read about men doing things for their women, and i know i know there are stories where women did too, this story is like that too, Nandini is a girl who does everything with devotion, studies? Work? Hobbies? EVERYTHING. So obviously when she falls in love, she's devoted.
He is her father's best friend's son, a quiet, shy guy. She's an extrovert, a total opposite, she doesn't give too much overthinking and just do things, and take things lightly yet seriously. But him- he is a total "everything is supposed to be taken serious" type.
She fell first and harder, he fell too but can't believe someone can love him like that.