Waltz de l’adieu was written in 1835 by Chopin as a solo piano ‘farewell’ musical work to Maria Wodzińska, to whom Chopin was engaged.
Chopin’s feelings for Maria left their traces in his Farewell Waltz, Op. 69, No. 1, written on a September morning. The beginning theme is melancholic and nostalgic, reaching a small peak. The second part is played more cheerful, and goes back to the initial theme. The third theme is the most playful, while the fourth theme is marked ‘poco a poco crescendo’.
If you want to understand and get to know Chopin, you can read his letters.