I'm struggling. A boy ignored my message, but it was quite warm before. I don't know what happened.

Hello, landlord. As a boy, I answer this question from my point of view.

What you said was that once you didn't wait for him, his attitude towards you took a big turn. There may be two situations: first, he really likes you, but at that time your behavior was completely opposite to his meaning, so he was angry. Maybe he is also testing whether you really care about him, and then boys like to be cold to their favorite girls for a day or two to see what the woman's attitude is and play hard to get. Second, he doesn't like you at all. Think about it. He won't contact you for such a trifle. What does this mean? If he really likes you, why can't he stand this little thing? Maybe he just wants to have some fun.

I suggest you take the initiative to contact him every once in a while. If he still ignores it, just drop it. We are all dignified people, not so humble!