My brother said I have a bad attitude, was he right?

So I'm staying in my brothers house and we decided to go out for the 4th of July and while everyone else was in the car he asked me if I brought the extra house keys and I said no cause I wasn't told to bring it but he said that its something I should know anyways. I felt a little offended and I didn't like it. Was it something to feel offended? I felt like I was being blamed or something...
My brother said I have a bad attitude, was he right?
Post Opinion