Girls who send text messages sometimes don't reply.

If you are old classmates and there is no spark between you, then now he may really dislike you. She thinks you have left a good impression on her, so maybe he is sending you a good friend card, or maybe he is not, but he especially appreciates you. If he really appreciates you, I believe he won't be so simple, that is to say, you are very good, and not, well, very good.