Hello Melodious,
Welcome to the site and I am so sorry for what brings you here. You are not alone. I am not sure how many times you have gone through this. I am also married to a heroin addict. When I met my husband he had been clean for 2 years. He managed to stay clean for about 7 years and started again. Only this time we are married and we have two children. What I believe actually started his addictive thinking again was a pretty bad accident that required opiate painkillers. What I have read in many articles and research papers is that when ex heroin addicts takes opiate pain medication it wakes up those connections again. So my husband has been trying to stop for some time now. He really is having difficulty accepting the whole giving it up to a higher power. It is very stressful and it does have a direct affect on your health. I know because it is affecting mine. I will be sending prayers your way. Remember to take care of you