Does she regret friendship betrayal?

My best friend attacked me almost a few months ago. She had mental health problems but i knew part of the problem, was she was extremely insecure over a guy that just used her and had no respect for her. Another part was she was someone who craved attention, and she secretly envied the respect i had for myself when it came to men even though she got all the attention, and i was extremely ambitious. She called over and over again on the day she physically aulted me. I refused to pick up her calls, she sent me a text saying lets just talk. When i told my family they called her and lost it on her, calling her everyname under the sun. My little brother who is a giant was absolutely furious swearing at her and calling her a ******** and telling her he'd kill her. He said if he saw her near our area again he'd mash up her car and told her he'd call the police on her. Her mum supposedly said that we'd really upset her and she was crying. Two days later she called me again and i was ready and called her every name under the sun, wished her dead, called her a piece of sh*t and a slag. I told her to crawl under a rock, told her i knew more people than she did and i'd get them to beat the crap out of her,and i would have done as well, anything i could think of i was furious. My little brother tried to calm me down took the phone off me and started talking to her, he told her we'd cancel the police. On the phone to me she tried to show bravado, when my brother took the phone she started crying, saying she was scared i would get people on her. He told her he'd talk me out of it, he didn't want me stooping to her level. She started crying some more saying she just wanted to speak to me, i refused to speak to her. She asked if we could speak for one last time and say our final goodbyes, i told him to put the phone down on her. She was genuinely convinced if she cried enough i would feel sorry for her and make peace, my brother had to calmly tell her "Don't you get it, she's locked you off." He left that conversation, almost feeling a little sorry for her. It was like she'd just kicked off the day she attacked me. Even after attacking me, she wanted to go again. She swore at me told me our friendship was done,spitting all venom. Then when i said ever so calmly your right, take care of yourself and started heading in the opposite direction. She panicked, and started calling me over again. I havent spoken to her since the day she tried to apologise. Do you think a) I stood up for myself well, and B my friend regretted what she did? My frien had always been manipulative and controlling, it was when i started making new friends, confident friends and goodlooking friends she became threatened. She conveniently became obsessed i was bitching about her. I think i stood my ground and thought her a lesson the day she called. My brother said she said she'd never heard me like that before. What do you guys think?