Did Jane Austen say “Friendship is certainly the finest balm for the pangs of disappointed love.”?

Did Jane Austen say “Friendship is certainly the finest balm for the pangs of disappointed love.”?

Found word for word. Yes. The text appears in works attributed to Jane Austen. Source and location below.

… rn with her about the room. Catherine was delighted with this extension of her Bath acquaintance, and almost forgot Mr. Tilney while she talked to Miss Thorpe. Friendship is certainly the finest balm for the pangs of disappointed love.
Northanger Abbey — Jane Austen, CHAPTER 4 · ¶108 · Public domain (US), Project Gutenberg #121 · source

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