Well, I haven't come across any definite confirmation that Meri Guriya is based on real events. It could be inspired by various elements or completely fictional.
Perhaps it has to do with her emotional experiences. She could be sharing her feelings of love, loss, and hope throughout her life. It may include details about how she felt during challenging times, like when facing misunderstandings from others or when trying to adapt to new situations in her life.
I'm not entirely sure as it seems to be a phrase in Hindi perhaps. Literally, 'tum' means 'you', 'meri' means'my', 'ho' means 'are' and 'bas' could mean 'only' or 'just' and 'novel' means 'novel' in English. So it could roughly be 'You are only mine, novel' but it's a bit of an odd construction.
The novel may also explore the theme of self - discovery within the context of love. As the character experiences this incomplete love, they might be on a journey to understand themselves better. They could be realizing their own worth, desires, and limitations in the face of this love that is not fully realized. Also, the social and cultural backdrop of the story might play a role in shaping the nature of this incomplete love, so themes related to society and culture could also be present.