I am an addict and I have always been an addict. It is impossible to stop on your own with no support. Many people can do a couple of weeks but will use again and usually very badly. An addict needs to want to stop. It doesn’t matter what anyone else says to them. They will not stop using until they are ready. If your boyfriend can’t admit that he has a problem, then he probably doesn’t want to stop. You have a choice…protect yourself and walk away or stick around for the addiction to get worse and ruin the man that you love. It is also worth remembering that your boyfriend is ill. He needs help and spiritual guidance. It is not your responsibility to provide this, but you can support him. He won’t stop until he is ready. Good luck! I hope he finds help and you can both be happy together.