AITA for going off on my girlfriend for eating all the food?

As renowned researcher Dr. Brené Brown explains, “Boundaries are the distance at which I can love you and me simultaneously.”

This situation involves a clear breakdown in managing shared resources and a failure to respect implied boundaries regarding consumption. The OP was looking forward to specific components of the leftovers (macaroni, wings, pastries) based on the understanding that the large quantity would last for the week, especially given his specific lunch/dinner preferences. The partner’s rapid consumption, culminating in eating everything, suggests a lack of consideration for the OP's future needs or a failure to communicate about the division of leftovers immediately following the party. Her response—that it is 'just food' that can be easily replaced—minimizes the OP's feelings of being deprived and ignored, shifting the focus from equitable sharing to the ease of repurchase. The OP's strong reaction, while perhaps elevated by anger, stems from feeling that his expectations about planning and fairness were violated.

The partner’s focus on the ease of buying more food often masks an underlying issue of entitlement or poor communication regarding shared assets. While the OP's physical size difference mentioned in the text is irrelevant to the principle of fairness, his reaction of 'snapping' suggests bottled-up frustration, possibly related to perceived power imbalances or feeling unheard. Moving forward, the OP and his partner need to establish explicit, proactive communication protocols for shared food distribution immediately after large events. A constructive recommendation would be to clearly divide leftovers into separate portions immediately after the party, or for the partner to ask directly before consuming a significant portion that the OP was clearly expecting to eat later.