and perhaps meaning quite another?

In Chapter 27 we read Isabella's letter to Catherine, and such a letter it is! I wonder how she would have take it if she had not had James' letter first! Would she still have realized what Isabella is?

Here is what I am wondering about. We know that Isabella often says one thing and means quite another. Could that be the case here:

Many girls might have been taken in, for never were such attentions; but I knew the fickle sex too well.

Then just below, with regard to Captain Tilney paying attentions to someone else:

I pitied his taste, but took no notice of him.