Girlfriend admits her mistake and doesn't reply to text messages.

You two calm down for a while. During this time, you two, especially you, must reflect on yourself. If there are any mistakes in your words and deeds before, you should talk to her sincerely and admit that you are wrong, not once, twice or many times. She won't forgive you if you don't believe her. After all, you two really loved each other. Never! Don't rush it, it's not sweet to twist a melon! I wish you two can hold hands again!