Addiction

Is it actually possible to be in a relationship with an addict? Mostly I mean someone who relapses frequently. My husband will be clean for months then suddenly out of nowhere start using for a few weeks before basically his life and health begin to fall apart then he will stop just like that. Honesty it’s strange to me that he can just stop like it’s nothing and hardly have any problems. (He’s using meth) I try my hardest to support him through everything, but I’m starting to feel like nothing I try to do matters. It’s hard that he won’t take any blame and I try to be positive but it’s just getting hard to be. No one else seems to care about him but me, and when I try to be there for him I just get blamed for everything. Our life together isn’t bad at all, it’s just he has a lot of bad things happen to him that he can’t control. (Mom passed away, then dad passed away, his adult child doesn’t want anything to do with him, etc ) Some of these things are things I’ve dealt with while being with him and it’s like he thinks he’s the only person who has to go through stuff like this. And it seems like if you try to relate to him to help him he gets mad as if you’re taking away attention from him and his pain. Everything I try to do or say just makes him mad and he will shit down and then its like talking to a brick wall. I ’ve tried to get him to talk to someone and he has, but he says he isn’t depressed and doesn’t want medication, or to keep talking to someone which again I support. Any advice would be appreciated because I don’t have anyone else to talk to.