Cammy, I'm sorry that you found out your "friends" really aren't friends at all. I've had one friend who pretty much tried to cut off my friendship with C., absolutely horrible, luckily we stopped it before it happened. She was a liar and a cheat, I still dislike her today...
As for help, I think the only thing you can do is let your anger out on a pillow. Either that or try to get your mind off it by watching something or doing something interesting.
Well, I'm glad that you're moving back to somewhere where you have great friends!
*dials number* Hello? You've just been discovered.
Try to cheer her up by giving her something small. Nothing too big, just something that says "I care about you". I'd recommend forget-me-nots (because I like them XD), but it doesn't really matter, just nothing too big or sentimental, since Grace doesn't seem to be that type.