Take a risk, move countries and do something completely different.
What you need is to find a new perspective / way of understanding life. You need to re clarify what your life focus is about - what you want your legacy on this earth to be.
I'd cold turkey on my contact with the ex. And start spending chunks of time with new people, in whatever way you can. As long as you're isolated, you're not going to form new connections and you're going to keep missing her, it will take so much longer for you to feel better.
Fwiw I hit absolute rock bottom at four months out from splitting from my exh. I can remember the day it happened still clear as crystal, the pain was brutal. You are still in the early days of recovery. Give yourself time.
But also, do take action.
Plan to pack the job in. Be transient for a year or two. Look all over the world for "your place". Even when you find it, take the time not to put down roots immediately... take time to observe the place you are in, to observe yourself in that place. Meet many different people... sign up for challenges, charity stuff, sporting events. Hike the Appalachian Trail, do something that sounds crazy.
You'll find a new you, a reborn version of yourself that's stronger for the pain you've faced. That version of you, if he does find himself a father one day, will have priceless life lessons to pass on to his kids. If you don't have kids, you'll find other people (via charitable work, sports and community coaching, you name it) who need your support and love in a different but equally important way.
You are important and have a lot to offer the world. Go out there and start giving back. What happened with your ex does not define you, this isn't the end of you x