your husband's addiction is WELL beyond your ability to fix...in fact, the few times he has sought some type of help, however shortlived, has been when you two were apart. that can be kind of painful to look at and accept....that perhaps he actually stands a better CHANCE of truly finding recovery (and wanting to stay there!!) on his own.
just as you have just now started to come out of your cocoon, face some realities for your own addictions, and start the journey to healing - you did so with him far far away.
in the years you two spent together, you both steadily got worse. sometimes people are just plain ole TOXIC together...and time and distance are essential for survival.
it's not like he STARTED using the drugs the day you met, he's a long term hard core addict. and if by some miracle he gets into a program, stays there and then makes the deicsion to not use again ever no matter what, it will still take a long time for him to stablize and normalize. not 90 days, not 6 months.
the best, the VERY best thing you can do is to take care of you. and leave him to whichever powers that be you believe in. he has resources, he knows that help IS available, now is the time to let him find his way. you have your own path to follow.....