Should i still be her friend?

I want to be her friend but she gives me a headache. It's like i'm allergic to her or something. I have this friend. We've been friends since we were kids. Now that we are grown, we have our own lives. We saw each other at school and she decided to rekindle our friendship. That was two years after we stopped talking. I want to be her friend, because I don't have any other close friends except her. Most are acquaintances, and I am the type of person who actually kinda makes more enemies than friends? I don't know really about that, but anyway, what should I do? Should I still be her friend even though it's degrading to my health?