How long ago did this happen? How old are both of you? If it's a really close friendship - just give him time to cool off and apologize again. If he can't forgive you for words, then he was never that good a friend. Close friendships are built on lifetimes of overstepping! There's an old saying that goes, "familiarity breeds contempt." I don't think it goes that far, but we tend to pick on the people we know best the worst. Just the way it goes wrong or right. I think he'll get over it and you'll be fine.