Am I wrong to be frustrated with my girlfriend?
Why are you frustrated with your girlfriend?
My girlfriend always acts innocent when she is not
It's interesting that you've noticed such things, but I think you shouldn't let these small personality traits bother you too much. She might not be really doing anything wrong.
Are you saying that I'm wrong?
It's frustrating to hold in how you feel. Talking to your girlfriend about your concerns will help you to be less frustrated.