Do you have to say it in person to determine the relationship between men and women? Can you send a text message asking if you can be my girlfriend? Is this formal?

This question cannot be hesitated. If you want her to be your girlfriend, you should treat her as your girlfriend. Buy her a present and introduce her to friends. First of all, the advantages of this method are tentative. If she likes you, she will acquiesce in happiness. You don't have to ask her if she can be your girlfriend to make her shy. Of course, she can reflect that she doesn't like you, which just confirms his mind. That's what girls do. Very manly. Don't think about how to express yourself. If you are nervous or she doesn't cooperate, all the prepared words are useless, and improvisation is the correct solution. Always remember to treat her as your girlfriend, and you are half successful.