It could mean 'She is not just a girl, she is my life in my school love story'. It seems to convey that the girl in the school love story is very important, like she is his whole life.
Once upon a time in school, there was a boy who was quite shy. He met a girl in the library. As time passed, they became friends and then fell in love. To him, she was not just a girl. She was his life. They studied together, shared their dreams. Their school love story was filled with innocent moments like sharing lunch, walking in the school garden. But then they had to part ways after school due to different college choices. Yet, she remained his zindagi (life) in his memories.
I'm not familiar with the 'tu meri zaroorat hai' novel. You could try searching for it in specialized book databases, local libraries, or asking in book - related forums where enthusiasts might be aware of such a work.
The title 'meri zindagi hai tu' (You are my life) itself suggests a story centered around a very important person or relationship in the protagonist's life. This could be what makes it interesting.
I'm not entirely sure as the name seems rather unique. It could potentially be a very personal or region - specific novel. Maybe it's about a character who is seen as essential to someone's every flaw, but without more context it's hard to say for certain.
As I don't know the full story, I can't determine the significance precisely. But generally, if 'awaz' (voice) is the 'pehchan' (identity), it might signify the power of self - expression in defining who one is.