Level 0:
Gamble while gamble and may forget it for months. Gamble only with friends and gambling is not an option to kill boredom.
I belong here, though I always find gambling as the answer to kill time and to entertain myself when im bored. But I dont gamble often so I think I can classify myself as a gambler who can leave gambling anytime and forget about it for a while. Level 1-3 is the start of addiction but you can still go back to your old self if you realize its not healthy for you and for your family. If you can manage to overcome this level then you're still a gambler who knows his limit.