If she has kicked you down that far then kick her to the curb. Any women who is any bit of a women will realize that a man will always be a man and have our flaws. Myself for example have a tendency to take a crap and forget to flush (don't ask me how), and I know when I have cause I usually hear a "thats soooo gross" from the bathroom.

Your gf should accept you for who you are and have your best interests. For example when I first started going out with mine I really didn't care how I looked or know proper etiquette and shit and she has shown me a lot of different things like socks + sandals is a no no and shorts with shoes and gray socks is also a no no when your shoes are tan. But on the flipside I do the same to her.

But no matter what, neither one of us is gonna make one another feel like shit for forgetting to flush the toilet or doing something totally stupid. We just shake our heads, find a way to correct it and move on.