Would you have dated her at all if she had been honest about how miserable she is up front? If her inherent personality is just miserable, then how else is she supposed to navigate through life?
The choice is yours!
You dress up for interviews, more than you would to go get a coffee, and likely more than an average day at the office. Is that lying?
People also dress up for dates. They wear makeup and nice shoes. They’re not liars; they’re dating.
And all of that makes an impression before anyone has said a word.