I hope everyone is well. Iam at my last straw with a co-worker.

I have tried everything to stop her from bullying me, I have had meetings with her, I have always hid my anger and frustration and my tears from her as much as possible.
Everyone one agrees with me that she is bullying me but they don't want to get involved, which I totally understand. She doesn't stop attacking me until Iam crying then she smiles and walks away. I have never done anything wrong to her for her to bully me.
Its just I can't change jobs as I haven't got another one to go to. We started the same job on the same day almost 4 years this september. She has always been , not best friends but a little nice. But 1 year and a half ago she started to bully me and its getting worse. I have asked her if I have done anything wrong to her she told me I haven't she just told me that she hated me.
I don't want to hurt her , I just want her to back off and leave me alone , I get so scared going into work every night. My other co-workers always ask me if I get scared walking home at night , I alway say its more terrifying at work than walking home in the dark.
I can't use any hot-foot powder or goofer power or graveyard dirt , at all because I don't know where she lives. So I really need something I can do at home as I don't want to go near her , if I did that it will give her a reason to bully me.
I hope that someone can help me as I want to be happy again at work. Thankyou Sharon