I like a girl, and I always send her text messages. Why doesn't she ever text me?

Girls always do this. Maybe she's testing your patience. She's saying, you don't need to text every day. Anyone who gives it to them will feel bored. Just send a chat message once in a while. Another is that she would rather call each other than send text messages. As you know, girls are very economical. Don't keep calling. Just call once every two or three days. She misses you, so she will call you. Another is to spend some time asking her out.