Love him and get him help.  I lost my mom a three years ago to nightmarish lung cancer (im talking amputation of two legs and fingers due to microvascular thrombosis) during this and after her death the only way i FELT I could survive was meth, pot, pills whatever i could get my hands on.  The only problem  with this is that it was an excuse for using, there was a deeper issue, ive been sober for two years now and only because i had loved ones that cared and loved me unconditionally...be his strength it sounds like he needs to do some soul searching but its hard to do it by yourself......

I agree with Suze that he needs help. The problem is that he has to want that help, it's not enough for you to want it. I'd strongly suggest finding a local Al-Anon meeting; they are technically for spouses and families of alcoholics but there are lots of folks with various drugs as their substance of choice and it's really helpful in terms of understanding your role -- what you can do and what you can't. You might want to try a women's meeting; it can really help to hear from other women in the same boat. It can also help to look at ways that you might be supporting his addiction without meaning to by covering for him, helping him pay for drugs, etc. A key thing that needs to happen for him to want to quit is for him to feel the consequences of his actions. Good luck to both of you!

Bothof my parents...their parents..and my siblings....all have a drug addictions of some kind.

You do not let him hurt you, your children, or anyone else. You don't give up hope, or faith, but you need to promise urself that in the end it is your family that matters..and his drug addition can't be a part of it.

I would try to get him to go to counseling...maybe some with his brother..if even possible. It really does help when it comes to death, and family issues, especially ones that include depression. Just know that you can't change him and that the only person who can is him self and his will power.

Best of luck!