I'm going to confront my girlfriend about her being rude.
Is she only rude to you?
Yes, she's a rude person to me mostly. I don't know how to put up with her rudeness.
It's not always a bad thing to confront someone about their behavior if you feel it's disrespectful, but you shouldn't try to change how a partner acts too much. Just because you are dating them doesn't mean you are entitled to dictate how they behave.
You're right, I'm going to apologize to her tomorrow.
I'm glad you see that point of view. I think talking with her will make your relationship stronger.