We used to be best friends, but now we are not together, and our relationship is getting more and more distant. She seems to have become unlike her. She never replies to text messages. ...

In fact, you should try to understand your good friend. Of course, a distant relative is not as good as a close neighbor, and you can't change this fact, but you can still be close to your friend, just think about some problems for her and put yourself in her shoes. Friends will never betray sincere efforts!