Scrooge's sister, Fan certainly loves him. From his visit with the Ghost of Christmas Past, Scrooge gets to see his younger self interact with his much loved sister. She clearly adores him.
"a little girl, much younger than the boy, came darting in, and putting her arms about his neck, and often kissing him, addressed him as her "Dear, dear brother." (Dickens)
"I have come to bring you home, dear brother!" said the child, clapping her tiny hands, and bending down to laugh. "To bring you home, home, home!" "Home, little Fan?" returned the boy." (Dickens)
Scrooge is deeply affected by the sight of his grave. He is disturbed terribly with the thought that no one would mourn his loss. He felt that his death, in the vision, was disrespected. It is his fear at being stripped of his dignity in death that moves Scrooge to repent.
Even though the visitations of the other two spirits are very significant and have an impact on showing Scrooge where he went wrong in life. It is seeing his headstone, knowing that his life would also end, that stirs him to change.
Scrooge was very influenced by his nephew's family and the Cratchitt family. His nephew reminds him of his sister Fran, and that reminds him of how he used to feel when he was around his sister. He feels that he should have accepted Fred's invitation to celebrate Christmas with family. The Cratchit family touches him because they are so poor but so grateful for what they have. He feels saddened by Tiny Tim's condition and he hopes that Tim will get better.
Two people who say nice things about Scrooge are Bob Cratchit (who blesses Scrooge as the founder of his Christmas feast) and his nephew Fred (who still loves Scrooge because his mom had). You can find both of these during the scenes with the Ghost of Christmas Present.