As I said before, without more context, it's hard to determine exactly who Dil Nawaz is. He could be anyone from a local hero to an ordinary person with an extraordinary story.
The story of 'dil se dil tak' likely revolves around relationships. It could involve the meeting, falling in love, and facing challenges in the relationship of the main characters. Maybe there are elements of family interference, personal insecurities, or misunderstandings that the characters have to overcome. Without having watched it in detail, it's hard to say exactly, but most such shows follow a pattern of exploring the various aspects of love and relationships.
The title 'dil akhir dil hai' gives an impression that it might revolve around the concept of the heart. It could be a story that delves deep into human emotions. It might be about a character who has been through various experiences that have shaped their heart. They could have faced love, loss, betrayal, and through all these, the story could be about how their heart remains a heart at the core, with all its vulnerabilities and strengths. However, without proper knowledge of the actual story, it's difficult to say for sure.
Since I haven't seen the full story of 'dil se dil tak', I can only assume it's a story about deep emotional connections between people, likely in the context of love, with the characters experiencing various emotions and situations that test their bond.
The 'dil bechara' real story is based on the novel 'The Fault in Our Stars'. It's a story about two young people who fall in love despite their difficult circumstances. They both have health issues but find solace and joy in each other's company.