The boy didn't reply to him in time by texting.

Everyone ignores it sometimes. It doesn't matter much if I reply to the message late. I'll call you if it's urgent. If a boy is angry about this, isn't it a little too narrow-minded

Because of a message, I don't think it is necessary to emphasize these little things like this. It's mainly the way you two get along. Whether we can tolerate it. Understanding each other is the most important thing.

There are no people who stare at their mobile phones every day. Wait for the other party to reply. So don't care about these little things. Go back when you see it, because everyone has their own business to do and you can't hold your mobile phone every day.

It doesn't matter to him whether he is angry or not. There is no need to explain this matter. It is too small. If he really cares, then you should educate him well.