I noticed no one reply yet. Sometimes people abandon for many reasons including:
The other person said or did something that scared them. They feel guilty about something they've done and assume they would never accepted if someone knows. Sometimes there was no chemistry. I noticed that it was a long term relationship. Perhaps she found someone else and feels like she needs to stay away from you in order to be faithful to her new bf. She might still like you and is trying to put your relationship behind her. She may find that a long distance relationship just isn't enough. Have you tried talking to her? If she feels guilty about something, it may be hard to find out the truth unless she begins to accept whatever it is that is bothering her. There are some things that are hard to ever admit. Don't worry about incorrect wording. It is not words that are alienating--it is the feelings behind the words. This is why a genuine smile is so powerful. It is so easy to have sloppy communication--if the person likes you, it will be easy to straighten out any kind of incorrect wording that may have occurred. Also, when we lose someone we loved, we go through a grieving process. That process takes time. I hope you feel better soon...