I'm going to hide my dishes from my girlfriend
I'm not sure why you would want to hide your dishes?
Yes, I mean its so common sense to use my dishes. What does she think it is? A storage room?
Partners are expected to be honest with one another. If you're doing something petty like hiding dishes from one another, it shows a possible lack of trust when it comes to the big things.
It's okay. She has been very naggy and I'm sick of it.
I don't think that you understand, if you are caught lying to your girlfriend and she finds out then your relationship may be in danger. Why would you want to lose someone that you love, even if they nag you every once in a while?