What should I do if the girl suddenly doesn't reply to the message?
What do you want to do?Ask her?
What are you doing?
Why don't you speak?
Slept?Wake up and look for me?
Aren't you done yet?
This is not the norm for most boys, this is the case when chatting with the girl you like, let me tell you, falling in love is a game between two people, she may be busy and didn't see your message, but it's unrealistic to not see it all the time, so just wait, if you don't reply to you, you wait, wait until she returns, and then you will have the next round of chatting.
Many boys end up licking dogs, all because they keep adding weights to the scales, originally the scales of the two of you should be equal weight, they are flat, you continue to tolerate, wronged yourself, overly concerned about each other, have no bottom line, etc., add more and more weight to your side, causing the scales to tilt, she is high, and you are one level lower than her.
She was half an hour late, you said it's okay, I'm willing to wait, and then the girls are used to Xi it, it's okay to be half an hour or even an hour late, anyway, you're willing to wait;
It doesn't matter if she doesn't reply to your messages, anyway, you'll come to her later
So that she doesn't use you as a dish more and more, it's all your own doing.
So in getting along, the two of you must be in a balanced state, and you have to use your behavior to tell her that this is not right, we need to respect each other, so that the relationship can develop in a healthy and positive position.