Is it normal to display emotion around people who hurt me constantly?

I've been holding back my high school friend's attitude for years, and she doesn't know she's been hurting me. I did speak up to her about what makes me feel hard when I'm around her. That was the first time I confronted. But she only felt like she was the victim and continued to do the bitchy things she usually did. From that time I stopped doin anything about it, and without realizing, I found myself keeping more and more distance from her, and I felt great. But she began to think that I've been hurting her cause m cold to her. When she posted s.th like that online. My brain got blank and almost forgot why I need a distance from her. I feel the guilt. Such a horrible feeling when I keep everything in mind till I explode, and who's the bad person, I am.