"Remember that the reason you're doing this is to make YOUR life better" not your kids lives as child support is meant for. Quit buying your new boy toy new trucks, new truck tires, a riding lawnmower, a rowing machine, endless numbers of smokers and gril
You don't get over an addiction by stopping using. You recover by creating a new life where it is easier to not use. If you don't create a new life, then all the factors that brought you to your addiction will catch up with you again.