Personally, I don't see what you did wrong. First off, from what I can gather, it was your friends who were against him, with out you telling them to be. You understood he was 'only kidding'. In my book, thats not your fault. And then, you apologized to stop any hurt feelings. As far as I can tell, you've done everything right. So, I comend you, you seem to be a really nice person at heart. To be honest I wouldn't have apologized, but as many people here have voiced out, I'm just a jerk. ^^;