AITA for calling out my friend for ordering food after she asked me to cook dinner?

So I am a disabled college student that works part time. When I have the time and energy I enjoy cooking homemade meals for my friends. However this evening I had a friend who had asked me a couple days ago if I could cook dinner. I agreed but reminded her that we would be using my dorms shared kitchen.

She agreed on both the meal and where it was to be hosted so long as I cook after she gets off work at 8. After contacting the rest of my friends that would be eating with us it was agreed to be after 9. Around 8:45 I head downstairs to the kitchen to set up. Except there's the large group of international students using the kitchen and it is not large enough for us to both be in there.

I let my friends know and my friend who requested the dinner complains about being hungry now. This isn't new behavior and one of my friend's offers for us to use his room as a place to hangout and play some video games before dinner.

As we are hanging out my friend that asked me to cook dinner makes a comment about having ordered Mac and cheese. I didn't say anything to her at first but I was really hurt. I spend a lot of money and energy on making dinners for my friends and it doesn't normally upset me but to order food after expectially asking me to cook is a big no no for me.

I waited for confirmation that she got a lot of food versus a small order that would not impair her appetite. When she returned with a full combo meal from KFC I told her that because of this the next time she asked me to make dinner the answer will be no. It would have been probably another 30 to 40 mins before dinner was done but we had access access snacks and the other two people I were cooking for where also starving. So I am I the asshole for telling her this?