boyfriend is mad at me

My new boyfriend is mad at me, we were talking on the phone Tueaday night and I callled him lame for not coming over ( I was joking) he got offended and took it as I called him outta his name and disrespect. Yesterday I called him and told me he was still mad :(! What should I do ? no I dont wanna break up with him, I didn't mean for him to get mad at me. He lives around the corner from me but he is always out.