What do you think about me fighting someone on Saturday?
Why are you fighting him?
He's my friend, but he's always bragging about things that I don't really dig. He is also often rude to others
I understand, but it's not good to fight someone. You should just try and let it be.
He has no respect and I don't like him.
Fighting other people, especially strangers, is rarely smart. It sounds like your friend isn't being as friendly as he should. Rather than fight him, explain to him that his behavior is affecting those around him.