ADHD/addiction/anxiety

Anyone have experience with this perfect storm of ADHD, addiction and anxiety? My husband was diagnosed with ADHD as a child and is on medication. He's been struggling with tobacco addiction (and hiding it from me/lying about it) for several years. We've been having serious marital turmoil for the last six months (related to adhd and tobacco use) and during this time he's started medication for anxiety, and - as I learned last night - an alcohol dependency. He has disappointed me so many times and frustrated me to no end but now I'm stuck in a position where I can't help but help him and feel bad for him. I still love him very much and I want him to be well but it's so hard balancing that with how angry I am with him. We're in our early thirties with no kids yet. I just don't think I can have kids with this man, and I know I want kids, but I don't see how that can work well. I'm feeling so confused and lonely about all of this.