I like a boy very much, but he never sends me a text message on his own initiative, and rarely returns my text message. Should I delete him? Looks so sad.

Delete it. Delete the sad past, if you can't see it, you won't be heartbroken. Sometimes letting go is also a fulfillment of love. If he doesn't like you, leave him alone. If you really love him, give it up. As an experienced person, I advise you that if you persist blindly, you will be hurt. Since efforts are futile, leave him silently. I have the same experience as you, believe me. Hope to adopt.