Friend for 5 years cut me out of her life

One of my closest friends recently decided to cut me out of her life. I tried to reach out to her and asked if I did anything and she responded that she thought that I didnt like her anymore so she decided to leave me alone. She also has a YouTube channel and posted a video talking about how I was a terrible friend and told of how I did awful things to her- none of which were true. She has changed from the person that she used to be and I was okay with that as long as she was happy and healthy. We had a great friendship but recently she started becoming toxic and would get into fights with me for no reason and talk badly about my family. I know that I should probably just get over it but I dont have many friends and dont want to lose her. Any advice??