chocolate
re your comment (that I have separated out for clarity):-
"He's agreed to go to counselling although says I'm blowing it out of proportion"
Counselling therefore is a complete waste of time. However, counselling solely for you is essential; you need to figure out for yourself why you are allowing yourself to act as his enabler.
"I agree with what most of you say but I'm not sure why I'm being attacked-I do love him so yes do want to work to overcome this-not just chuck him out".
Do you actually know what a mutually loving relationship is because this is surely not it. Your H is in a relationship with cocaine and values that far above you and his children. I mean this kindly but you are in no way qualified to help him and as his wife he does not want your help anyway. He does not want help full stop. What is stopping you from actually giving this man the push?.
HE has to be the one to drive forward the idea of recovery from his addiction, any and all attempts on your part to address his addiction without his wanting help are doomed to failure.
I would also read up on co-dependency within relationships and see how much of that actually resonates with your own behaviours. His actions to you are not loving ones at all. You cannot rescue and or save someone who does not want to be saved.
"People do make bad decisions sometimes and do need help to get out of it"
This makes you sound like you are responsible for him which you are not and is also a part of the overall enabler behaviour. You are playing a role in all this; infact multiple ones. You are also the provoker here (you never forget). You need to acknowledge your roles here.
"Currently it isn't affecting our children as they are tiny but we need to get a handle on it now"
There is no "we" here; its you driving this forward. This is already affecting them, they pick up on all the unspoken vibes and are too young to actually understand what is going on around them. They see you upset within the home and do not understand why this is, they are too young to articulate their feelings at all properly. You cannot fully protect them from the consequences of his addiction.