Ive been there 3 times all over 7 years duration.
Ine such was my first marriage with two girls 7 and 4yo when following 11 years emotional abuse had to walk out. I’d also had a suicide attempt.
I learned that moving on stopped the torture. I also learned that after a given amount of time about 3 months , if it can’t be repaired a new life is the better option.
finally, I reduced contact to her only when necessary. The abuse continued for 14 years in subtle ways whenever I spoke to her. As our youngest reached 18yo I stopped all contact. A relief.
Obviously he has harboured resentment and it’s overflowing, less likely depression involved.
The best remedy for you is social expansion, hobbies, sports, dating just to find a happiness.
beyondblue topic the best praise you’ll ever get
beyondblue topic distraction and variety
I hope they help. Repost anytime