I can't give any emotional type advice on how to deal with the personal side of things, but I have always found the looking forward view better than the rearward view when dealing with bad situations.
What I mean is that this is a chance for you to embark on a major change to your life. Emigrate, travel, cycle round the world. There's nothing holding you back if you want to do it. Possessions and relationships are chains that hold you down. (When that's where you want to be, then it's good)
About the best advice I can offer is to liquidate/sell all shared assets and then divvy up the proceeds. Don't be sucked into buying out her share and getting deep into debt to do it, because then you will be chained down to your new masters at the bank.
Cash (or lack of debt) gives you freedom and that's something few of us in our middle years get a chance to enjoy.
Whatever you do, good luck.