changing, always

Brad and I split up the business Aug 3rd, and it's been a wild ride. Brad has taken an existing system and continued to work it. I've implemented a couple new systems, while getting signing up. It's been hard.
From Brad's actions, it seems that he really doesn't want to do anything with these properties we own jointly. He's not answering my phone calls, e-mails, or inqueries about our shared properties. This is a partnership ending that's turning sour very quickly. I'm thinking of taking my money and running, and letting him take care of all the headaches the way he wants.
For me to implement this, I need to cut all dependencies on him, and negotiate a fair solution.