Jill L. Spriggs on Ellen Moody Austenlist wrote:

"The fact is Miss Larolles spends her life seeking what is not worth having and most of the time after strenuous efforts is thwarted anyway. Her life is just one distress after another: you plunge into crowds and are are just about "half squeezed to death"

Burney ... sees far more deeply into the figure of the female fool and brings home to us not only the absurdity, the ridiculousness of such a life, but the pathos and melancholy of it. Austen caught this new train and brought it into her Persuasion."
Suppose Anne is feeling slightly foolish and fearing it will all come to nought...