Thank you for sharing, Ant.
Have you tried going back to dating again? Another thing that helped me back when my ex-husband had an affair is intense workout. I think you handled it good, all I did when I found out was isolate myself from my family, lockup and cry. A therapist would have helped me, I hope your condition gets better.
I had to edit out their full names, that is against the rules to post their identities, sorry Ant.