I'm losing my best friend because of my anxiety and I don't know what to do?

Due to my anxiety I constantly doubt my friendship, it's hard to tell anymore what's rational and what isn't. Recently my platonic best friend of 5 years and I have had problems. She has changed recently, tells me she feels completely different about topics we have discussed in the past. Also I feel like I have to walk on Eggshells with her now, everything I say she takes the wrong way and goes off on me. It's like she's become another person. She causes my anxiety to go through the roof. It's telling me, she isn't my friend and has only been using me. I decided to ask her if she truly cares about me. She got furious and told me that I made her feel like she was a bad friend. Now she isn't talking to me at the moment.