My besst friend and i got in a fight. I let her use my head band,and said she would give it back the next day?

The next day I called her and she said she was going to wear my headband, then she hung up.Later I went over to her house. I saw her wearing my head band and before i called her, I picked out an outfit to go with the white head band because she was supposed to give it back. When i asked her for my head band back she told me i had on too much makeup.She always gives me put downs,it makes me so mad, but i never say anything because i dont want to start a fight. I told her i wanted to wear the headband, and she said, "ur hair looks fine! I want to wear the head band", then she took out the headband and her hair looked fine. She put it back on and walked upstairs so i followed like always. I said," i wanna wear my headband" Then she said,"wear this headband"and I told her i wanted mine, she called me immature and impossible then i told her i was leaving because she was being mea. On my way home, she screamed," I'm throwin it in da gr!" I said fine. Who's fault was it? Me or my friend?