Yes I think you are right, your husband would turn to drugs more probably as he would feel abandoned. It’s a tricky one, the drugs do things to the brain that don’t make them think like they usually would or should. You should never blame yourself though and try to look after yourself as well, it can be just as hard for you as it is for him. First step is for an addict to admit he does it and/or has a problem. We have only just got to this stage after 6 months of thinking he was doing well.
Keep your chin up guys
Xx