You must get sleep, it's the fastest way to get properly detached. I suggest Remeron (aka Mirtazipine) as it is a tetra-cyclic antidepressant that is fantastic for sleep repair. IT does cause increase in appetite but if you watch what you eat you'll be fine. It's much safer than Ambien as well as benzodiazepines as it is not habit forming and does not cause withdrawals.
What do you do to make yourself feel better? Do you have a lot of friends (or a few) that you can go hang out with? What hobbies do you partake of? Tell us more about YOU. You're the important one here, not your walk-away husband.
M 10yrs T 13yrs BD #1Oct 2015-PA between WAH and COW BD #2 April 2016-WH resumed PA, she broke it off Jan 2 2017 WH says he wants divorce April '17-Letting go 2018 D busted DD8, DS6, DS3