In short, you have to be dedicated about quitting it and be true to yourself, don't fool yourself that you want to quit gambling but the other day, you will do gambling again and will just going to forget what you have promised to yourself that you are not going to gamble anymore. If you are just going to make fool out of you, then don't say that you want to quit gambling, just do gambling and don't stop until you don't have anymore money to be spend on your addiction, and I know that you one day that you will realized that if you quitted gambling for a very long time, then you do have a lot of money right now.
That's correct, in order to quit gambling the onus lies on you to make a conscious effort into tackling it. It is not something we just wake up one day and get out from, it's far difficult and if you're not serious it will play with your emotions until you go bankrupt and in serious debt. So I will advice all that want to quit to admit that it is never going to be easy and so they'd need to be ready and conscious enough to quit.