Sharing Our Innermost Thoughts

I never had good friends in school. Just wanted to graduate so I can make new friends in college, I went to college, got new friends. I had a best friend at first I thought she is the one, she was nice sweet caring, slowly she started blaming me for her toxic relationship that I am not helping her out. She and my boyfriend even made me feel insecure. They were close and made me feel inferior but I thought I am kid they are mature and they know more than me. I seriously tried to understand, then for a year we didn’t talk after I had break up we reunited I thought she is so nice that talking again, and accepted me as a friend again. But she was bitching about me to my other friend who was not close to me. I don’t know what i am feeling about not being friends with her again is right or not. Am I bad person. But i feel she is toxic for my life and I cannot handle her?