[Okay. Let's try this again. It's easier to do this via text, where he can at least look at it and delete whatever's blatantly wrong before he sends it. There's a chance that Kuwata will delete everything before he reads it, but at least he tried.]
Kuwata-kun,
I wanted to apologize to you for what happened the other day. You're right, of course, in what you said about intent being important. I understand that, I just wasn't able to express it properly at that point. A few here have said that I'm bad at talking to people, and I'll admit that I don't always say what it is that I want to say. I don't know why; it's just how things are. But that's no excuse, and my behavior was deplorable.
5/all this elegance and social grace right here
Kuwata-kun,
I wanted to apologize to you for what happened the other day. You're right, of course, in what you said about intent being important. I understand that, I just wasn't able to express it properly at that point. A few here have said that I'm bad at talking to people, and I'll admit that I don't always say what it is that I want to say. I don't know why; it's just how things are. But that's no excuse, and my behavior was deplorable.
I'm sorry.