I was at the same stage as you…in fact the similarities made me thought I’d sleep-wrote this thread!
I’m in the process of getting divorced…nearly 2 years since I moved out and have now found a fantastic OH who actually thinks something of me. Not only that, completely accepts the situation with ‘the ex’ and is supportive to the n’th degree.
It’s hard and makes you feel awful, but looking back I’m glad I left.
Good luck fella and remember your family and friends. I shut mine out when they tried to help as I took the breakdown of my marriage as a personal failure so was ashamed of it. That was a stupid attitude – friends are amazing things…take all the support you can.