Koshea, Your girl might be oblivious to what she did. She probably has no idea what she did was rude.

Simply put it and tell her what she did was rude. Help her understand what she needs to understand. Two people partner up for one main reason and that is to enlighten one another.
If she doesn't understand expect this like bullshit all the time, and then, that maybe your real que to get mad.

LOL @ looker, there's some advice if your realtionship goes bunk.