Scrooge is portrayed as a miserly and cold-hearted individual who prioritizes wealth and financial success above all else.
His obsession with money and his disdain for sentimentality or human connection suggest that he may have chosen a solitary life to avoid the emotional complexities and responsibilities associated with marriage.
It's also possible to infer that Scrooge's focus on accumulating wealth and his lack of generosity may have made him an undesirable prospect for marriage. His miserly ways and lack of empathy could have repelled potential partners, leaving him alone as a result.
Furthermore, the ghostly visits in the story, particularly the Ghost of Christmas Past, provide insight into Scrooge's past relationships and how they may have contributed to his current state. The broken engagement with Belle, his former fiancée, highlights the impact of his priorities on personal relationships.