Susan, you have found a good place here. There's not much I can add to what everyone else has said as you've been given some very good advice. Only thing though, with an addict, their actual use is about 5 to 10 times more than what you actually know about. You said you grew up in a family of addicts. Think of how you felt as a child, and think if you want to have children with this man and allow them to live through how you lived as a child. I know how it is, my father was/is an addict/alcoholic, and now I have a 26 year old son who injects. Right now you have a choice. Please come back on here, and find a meeting that fits your needs.
Hugs to you, and God bless you.