Director Prashant Chadha is close friends with Pandya, who he claims the actress left for Ranbir Kapoor.
He told Mumbai Mirror: "Nihar is like my brother. I was very close to Deepika as well once upon a time. In fact, I had launched her in a music video. Everybody knows how she walked out of Nihar's life for Ranbir.
"Nihar was heartbroken. He had done everything by the book. He looked after her for three and a half years. In fact Deepika stayed in Nihar's house with his parents for three years."
Chadha added: "The film starts with Nihar's monologue where he says, 'I loved Deepika and wanted my name to be associated for her for eternity'.
"Nihar then wonders what went wrong. The film then goes into flashback. The film is about Nihar's quest to find out where Romeo went right, and he went wrong in love."
Chadha previously directed Aazaan and Aap Kaa Surroor.
Padukone is currently dating tycoon Vijay Mallya's son Siddharth Mallya, though actor Neil Nitin Mukesh described his relationship with her as "more than friends" in August.
The actress reportedly ditched the film Race 2 because it clashed with a project that co-stars her ex Kapoor.
