This quote would seem to fully justify your pessinism, but it was specially selected by you! Anyway if I really have to choose, I prefer Goethe, especially the sweet sadness of Werther, in accordance with a certain, concealed melancholy of mine.
I am NOT a pessimist! (And also not a broken vinyl record, which has to repeat itself over and over again) == The most famous lovelorn guy of the German literature? Not my favorite. Very hard to read -- goes a bit over the limits of my damaged brain.