Originally Posted by
Gigabitch
Oh, poor Joanna. I'm going to surmise she's got mean parents who've taught her that cruelty is strength. Casually insulting people is mean, and you know she's just showing off for you.
If you're interested in saving her feelings, try to point out the same behavior in some uninvolved third party (like a celebrity). For instance, "I don't like Paris Hilton because I keep reading that she's said something mean and nasty about someone, and I really don't like mean people."
Then reward Joanna every time she says or does something sweet. If she says something nice, flash her a big grin, a kind of we're-good-people-and-I'm-glad-we're-friends grin.