The mobile phone sent a text message to the girl, and the girl refused me on the grounds that she didn't know me.

The first possibility: as a good friend, don't you understand? She really wants to refuse you and treat you as a friend.

The second possibility: what she means is: I don't know you yet, so get to know you better. I hope so

The third possibility: she thinks she can't be friends after breaking up, and she is afraid of losing you after breaking up. Is it hard to have a good friend? If so, then she should be a person who cherishes her friends and loves the past. Don't force it, it doesn't matter.

The fourth possibility: I really feel that time is not enough, work hard and have a chance.

That may be too much. I suggest asking her close friend to find out her impression of you. Choose a tight-lipped person and make sure you don't tell her yourself.