Sorry to hear that, ang, I know it probably doesn't feel like it right now, but you will get over this and you will see that she was not worth getting this depressed over. Instead of starving yourself, spend some time doing things just for yourself, stuff you've been putting off. See old friends, work out (hard, it's good for the stress) spend some time with your family if you have some, do fun stuff. Do things that you couldn't do with her. In otherwords, be selfish for a while. Someday you will see that she was not the girl/woman you had hoped she was, and it won't hurt so much. You might even be relieved that you dodged that bullet.
True. But there's hardly a steadfast rule for being a jackass, either.
Maybe he doesn't have anybody close to him. Maybe he considers a lot of the posters here, his 'friends.' His join date goes back nearly five years. Maybe he thought some of the people he's talked to all this time would like to know he's leaving, and why. Maybe instead of being a jackass and increasing his pain, you could just ignore threads like this.