Woman friends

I'm so over one of my friendships because I'm not treated right at all! But this bitch can't realize how messed up she treats me and I can talk til I'm blue in the face but everything is still my fault. Idk what to do. She's putting stuff about me on Facebook calling me satan. I'm 27 years old. Too old for her high school drama. And the guilt trips! I can't take this anymore. I'm pregnant and don't need the stress. Any suggestions?