Welcome to SR jmc! Glad you have decided to reach out for help. You are always welcome to post here in the Newcomer's forum, and also know that we have forums dedicated specifically to friends and family of substance abusers - take a look about halfway down the main forums page.
Regarding your husband, as ReadAtLast mentions, there's not a lot you can really do to make him quit. It's also very common for addicts to try and put the blame back on others by saying they don't think it's as bad as you do.
The fact that he realizes and admits he has a problem is definitely a positive sign, but he's going to need to be the one that makes the effort to change. You can't do that for him, although you can offer your support if he asks. You also need to prepare yourself for the possibility that he won't ever seek help. As discouraging as it sounds, that is a real possibility - so you need to prepare yourself to get the support you need if that happens. You'll find a lot of that here so I'm glad you've joined us.