I can't believe he doesn't like me and doesn't contact me! Is it interesting to leave WeChat?

Keeping it is a thought. He has tenderness for you, so he still pays attention to you. You don't have to think about it. He must have known he had an appointment with you, so he didn't contact you. Even if he contacts you, it's just a greeting. There is little chance of turning back. Don't think too much. If you want to go back, both parties are single and can take the initiative. Happiness is earned by yourself. Of course, if it's not suitable for being single, don't bother each other. Not disturbing is the simplest gentleness.