Yes, this is so important to note. The second she senses you have moved she will start reaching out to you again. If you let her, then this mess is going to happen again. You two clearly are toxic together and it's best if you keep your distance. I might even consider looking for a new job unless you really enjoy your current position (it doesn't seem like it has affected your work so that's awesome).

I get that you are lonely and feeling lost, I've been there, too. You should really spend some time figuring yourself out. When you have a better sense of self, creating boundaries and healthy relationships becomes a piece of cake. Also, this has been said a million times already, but I would have never freaked out if a friend broke into my apartment while drunk unless they were creeping me out. I think it was a combination of your angry text messages and her own personal issues, but I wouldn't beat yourself up over it! Stuff like that happens. This will be something you will look back on and laugh at yourself a few years from now.