Bad times. I hope you can both keep it on the right side of the line and avoid any more hurt than there needs to be.
My ex and I wrote a letter outlining how we were going to progress our lives and how we were going to divide up our possessions. We printed and signed 4 copies and each kept one and gave the other two to our respective parents by way of a ‘just in case’. We then went our separate ways, sold up and after the required time (2 years?) she went to the local courts to pick up the paperwork, citing irreconcilable differences and period of separation and a few months later the decree absolute was issued. It can be as easy as that.