What does it mean to send a message to a girl in the middle of the night?

It depends on what information is conveyed.

Late at night is the most relaxing and fragile time for a person, which will greatly stimulate a person's loneliness and desire to talk. If a person chooses to send you a message at this time, he may care about the other person in his heart.

In the dead of night, a person will feel lonely, so he will find some heterosexual chats who are willing to reply to him through social software.

Men write letters to women in the middle of the night, which shows that men are full of loneliness and emptiness in the middle of the night. Writing letters to women shows that they want to get comfort and love from women. At this moment, if women like each other, they should respond gently with language. Because love between men and women needs to be gentle with each other.

Talking to a woman in the middle of the night may actually mean that I have a little affection for you, but this affection is not strong enough to want to talk to you and meet you every minute.

Only in the dead of night, when it is convenient for me, when I find some fun to pass the time and relieve the loneliness before going to bed, will I think of you.

And not only you, but also some other members of the opposite sex may coexist.

So he spent most of his time and energy on people he thought might be his other half and might get married in the future. When he is alone in the middle of the night, he will want to manage his own fish pond, sprinkle some emotional bait and maintain a relationship with other opposite sex with the purpose of raising fish.