Friendship over

Hi, just recently my LDR best friend confessed that she got jealous on the new friends I earned through out the times were apart and she finally ended our friendship and said good bye. She told me that I caused her a lot of pain as she expected that she would be the only one that I will treat as a best friend. Until now I did not respond to her good bye message , coz I felt that it's being unfair to me being alone in a farway place while shes backhome sorrounded by her family yet it's my fault for gaining new friends.