Way Earlier Than I Thought

But here's my first official post. It was kind of begun a week or so ago, when I insulted a mutual acquaintance to one of my friends on AIM by calling him a 'big, dumb teddy bear'. I don't dislike him at all; he's just not the brightest crayon in the box. As insults go, not the nastiest. But today, said friend was presumably trying to jumpstart our dead IM and said 'I'm smarter than you.' We began discussing this statement and I said, because we're both rather intelligent but she is, by far, a better debater than me and would undoubtably win, 'Why label as smart, smarter, smartest. There's no need, we're both smart.', at which point her debater ears began twitching and she brought up this past conversation and started in on how hypocritical I was being.
I get my feelings hurt very easily, and I thought she knew that, mainly because she has reduced me to tears before. However, I can hardly blame her, because, out of pride, I've never let her see. And then, when I use some weak argument I'm trying to pass off as a joke, she'll start on me as if I was treating it as a logical argument. Once again, this is online, and it's hard to tell, but I think you'd be able to tell that, no, I DON'T believe the classmate is 'selectively mute' and that's what I meant when I said 'dumb'. I do have a reasonable IQ, and I know that there's no such thing as 'selective dumbness', not am I inventing it and pretending I think it's real.
I guess what makes this so hard is that she's right. I can get as mad as I want, completely tear her to pieces for being a jerk, but she's totally right. It was wrong of me to insult this person who wasn't around to defend themselves. It was doubly wrong to act all high and mighty about not labeling people when I've done it myself. She's also said I'm mean. I don't agree with her as much there, but she does have some points, mainly my treatment of some of the people in our group.
It's much more painful to be told that you're a hypocritical jerk when a part of you knows you actually are.