Scrooge is an outsider in society and is victim to his own, self-inflicted loneliness. No one necessarily pushed Scrooge away, instead he ostracised himself from society.
His fiancée Belle says that an "idol" has displaced her a "golden one", meaning his need for money has become a priority instead of nurturing the relationships he has in his life
Belle says that she hopes he "happy in the life you have chosen!", this is the moment in which Scrooge finally chose money and greed over everything else
Scrooge's choice of words is also very interesting here as he uses the word "business" to talk of a person's life. This suggests that Scrooge's life was business, the focal point of Scrooge's life was money and greed it is what motivated him and why he was never satisfied