Send a text message to someone you like, and he never replies. Why?

There are generally only two kinds.

1

He enjoys the feeling now, and he doesn't want to deepen or reduce it. Relatively speaking, his responsibility is less, isn't it?

In some relationships, vagueness may be better than clarity, so let it be.

2

He doesn't reject such ambiguity, but he just wants it, only to this extent.

Just like a sentence, you like him is your business, and who he likes is his business.