Some great answers. Some people just don't know how to behave in such situations which brings me to ask, how old is she?

In my own observation, young people in this day of smart phones just haven't developed appropriate communication and ettiquette skills. Neither have they had to practise the art of being articulate in what they have to say. If she does fall into this bracket, as excrutiating as it is, you might just have to end up accepting the communication she does manage.

You bear some of the responsibility for the distant relationship here. I suggest being proactive. Be the one to call on occasion.