It is possible that she would have continued her charitable work and advocacy, using her platform to make a positive difference in the world. As for her personal happiness, it would depend on various factors, including her relationships, career choices, and personal circumstances.
Ultimately, the events that transpired in Princess Diana's life were shaped by a complex web of factors, and any speculation about alternative outcomes remains speculative. Her untimely death was a tragic loss, and she continues to be remembered as a significant and influential figure in history.