Life is a constant process of discrimination between wants and needs.
The low-carb muffin or the mocha latte? The new ultra-thin laptop or the MP3 player and keychain storage media? The rice or the uncontaminated water?
Don't feel guilty, don't feel envious, don't feel angry. Simply make your choice.
Because once the choice is behind you, then comes real gratification -- the ability to question and the will to initiate change.