Heather,
He clearly does not see how great he had it with you - although I suspect that soon he will. How many women are really going to be ok with a dead weight that cannot support himself, that requires rehab, that cannot even handle a household??
You sound like an incredible catch that got into a very bad relationship and you tried your darndest to make it work against all odds.
You DESERVE better - so so so much better than that. You deserve a relationship built on a foundation of mutual respect and trust. One where your qualities are admired and you feel adored, loved and taken care of. That is out there, I promise you. And your ex just gave you the greatest gift of freedom.
You now have the opportunity to truly work on yourself to unravel why you allowed yourself to be treated this way and get back that self-esteem to KNOW that you are worthy of so much more that this one short life has to offer. So many beautiful, brighter days lay ahead of you.