My girlfriend and I live together and she works late hours, usually getting home around 9:30pm. I had a friend over and we went to get pizza around 7:30pm and now my girlfriend is saying that I should have gotten her pizza too even though it was two hours before she would be home. She says she feels like an afterthought. 

For context: she doesn't deal well with grease and mainly likes pizza from Papa John's(not where we went), pepperoni only(not what we got), and didn't even want to order her favorite pizza when she got home. 