Give value through your texts. Ask yourself: what would i enjoy to recieve or laugh at if i were this girl. What would I enjoy texting? Then text in a way that add something to her life. Nice or fun photos, sharing your thoughts or interesting activities your doing, asking genuine questions. Be interested AND interesting.

When you're giving value, you don't care if she'll reply or not. You're not waiting for her to text you back anymore, you take control of your interactions.

This applies to all social interactions as well.