Boyfriend=Pig

Wow I can't even believe I'm getting into this right now.... Let me start off by being the gentleman here and saying that I love my gf even though she has these uncontrollable tantrums. Today she randomly brings up a ridiculous past argument when we were at the grocery store. In the middle of shopping she starts arguing that I ate 2 brownies like 7 months ago for a camping trip we were going on... WTF!?! Then she carried into how I ate the last doughnut this morning when I bought them and got her favorite kind for her. Im typing this so that you people on the outside can back me up here because I just can't argue with her. She always thinks she's right no matter what I say so please for God's sake help me out...