My girlfriend asked me to send her text messages every day. As a result, one day I didn't send it, and she was angry with me

You're right. It's the usual practice.

But you get used to it, and suddenly your attitude changes. You're not used to it, she's definitely not used to it.

I'm just used to your short messages. I hope you think about her all day.

Girls are cautious, but they are also very satisfied. Don't they just want you to send a text message a day?

Since you like her, since you love her, keep posting.

Coax her, admit her mistake, change her attitude, tell her the reason, and promise not to forget it next time. ...