re: How do people cope with separation or divorce?

Focus on self improvement as much as you can.

Workout and get into better shape. Learn to cook well and focus on eating well. Learn a new language or hobby, something active preferably to expel excess energy. Physically exhausting yourself will help.

Once your brain calms some, read about whatever interests you.

It isn’t the same for everyone but making yourself “better” can help you short term to focus and have long term benefits.