Gosh Leila, if you’re just eating rice and apples it’s no wonder why you might be craving some other foods. Are you on the BRAT diet or something? I’m not a dietary expert, but perhaps there’s room to branch out from just eating rice and apples. If you expand your diet slowly you’ll be in a better position for when you inevitably “slip up” and eat some more exciting food.
Well yeah, I’d imagine his food is more enticing, filling, and nourishing. However given you’ve been mostly subsisting on rice and apples, it’s probably hard on your stomach to make the leap to eating foods that are rich and well seasoned.
Not to give you something else to worry about, but I would be worried about getting sick and dying by subsisting exclusively rice and apples.
What about the consequences of eating only rice and apples? There could be a chance you’re currently malnourished. It may explain the strange aches in your body.
As for the shopping, the way you describe it makes it seem like it’s a vehicle used for happiness and it’s no longer delivering the goods. People often return to old activities in an attempt to chase the fulfillment that they once brought. Now that you’ve repeated the cycle of enticement and guilt enough times, you could keep that in mind the next time feel the “temptation” to buy new clothes. Knowing where it all leads tends to make the activity seem pointless. Of course generally speaking there’s nothing wrong with buying new clothes.
But maybe all the drama makes you feel alive. I don’t know.
That brain is what you are 
It’s not “yours.” It could probably use some extra calories to work a little better.
If you don’t mind me asking, why do you eat only rice and apples?