Did I for get to tell you? I accidentally punched my friend.
No, you didn't tell me that! Was it really an accident?
No, I have to admit it wasn't. I was drunk and I was mad at him so I punched him.
Whether it was an accident of on purpose you should apologize for hurting someone. He's your friend and he's probably upset with how you treated him.
I'll think about it, our friendship isn't very strong right now.
Even if your friendship is not in a good place, you should still apologize to him. Hitting someone is wrong and you should take responsibility for your actions.