I want to get to know a girl. I know her mobile phone number and send her a text message, but she doesn’t reply. What should I do?

Since you are in class together, you should have a lot of opportunities to meet. Just sit near her during class and find opportunities to chat with her. Gradually you will become familiar with her. Then it would be better to call him and ask him to go out to play or go out for dinner. After all, he is not familiar with you now and has no reason to text you back. If you send too many messages, she will feel like she is being harassed. In that case, the gain outweighs the loss. In short, First think of a way to get her to talk to you.