Try to remember that she might not realize the extent of what she says if she's grieving deeply. Give her time to get over it, sometimes it can be a long hard process. I'm sure she didn't mean it to sound so cruel. Don't be in a hurry to throw that frienship down the drain. True friends are hard to come by and we should cherish them even if they do sometimes hurt us. Even if you have to make a card, might mean a lot to her knowing you went to the trouble, but even a store bought card with a personal memo inside will make her realize she was a bit too harsh...