Thanks allchopin,
In the link you gave it is said that,
"Composed in 1846/47, published in 1847/48 , dedicated to Madame la Baronne Nathaniel de Rothschild, (BI:164) . This second waltz of Opus 64 is just as popular as No. 1, although here a yearning melancholy and sorrowful expression brings the piece on a deeper plane of emotion."
In the first part of the Waltz, I feel that Composer sobs hardly visible(especially like 3-4 measures..). I know Chopin's life story. May be my feelings are prejudice. Nevertheless, these measures always gives pain to my heart:( Fortunately, the second and third part causes to forget that pain:)
I so much like that Waltz...
Penelope