1 is the Loneliest Number

A Raisin in the Sun by Lorraine Hansberry
Act 2, Scenes 1 and 2.

With a new house on the way, everybody in Walter's family seems happy, except for Walter. He feels sad and betrayed. The money, which stood for everything that he dreamed about was gone: "So you  butchered up a dream of mine--you--who always talking 'bout your children's dreams. . . " (Hansberry, 492). No one seems to be supporting Walter. His idea was completely abandoned. Moreover, his family still mocks his idea of investment when he is already at a low point. He is completely alone, even if his family is all around him. The loneliness soon gets to Walter's head and he decides to miss three days of work. His family tries to console him, but with no avail. It is only at the end of act two, scene two where mama reveals that there is a little money for Walter to invest in his idea. It seems that money creates Walter's happiness as it was the only thing that seemed to lift Walter out of his loneliness.