ask them to buy chips and other fattening food, and then throw some away each day and pretend like you ate it. That's what I had to start doing, it worked.
I'm sorry :( I lost one of my best friends a couple months ago for no reason and now I feel like I'm losing my other one so I know how that feels, And you really should eat something, I know I sound like a hypocrite because I barely eat but at least a little something, just to keep you going. I'm here if you need to talk love, I know how horrible things can get. Stay strong.