Sorry to hear of the difficulties between you and your husband – but at least things are out in the open between you and you both know what you are dealing with. He is probably as much hurt by knowing about the lying as he is about the gambling. It might be worth him looking for some support for himself – on the families and friends forum on here or through counselling – maybe you could consider couples counselling. Have you got anywhere with your GP yet?
Good that you are keeping yourself busy with other things – although you were busy enough already!!
Take good care of yourself.