Problems with my bestfriend?

Ok so my best friend of fourteen years who is also my cousin in law and just got over a fight. The fight was over her hurting my feelings and getting angry with me over me trying to talk it over. She basically said that by telling her I was hurt that I was a bad friend. We had never really had problems till she met this other girl I knew who is the fakest person ever who started telling lies and causing problems. During the time that we were not talking my husbands family all came to the realization of the lies. My friend started complaining about it and I told her that ever problem she is having is what I was being called a liar over and treated badly for. she got angry and said " I'm sorry I.was deseaved it wouldn't be the first time I had a friend that I decided I hated" scowled and walked away. I guess our biggest problem is she doesn't allow me to have feelings or opionions.what should I do.