It is not just gambling but everything of which someone is addicted, is not easy to give up. You are the person who can help you at first, you need to make yourself assure that what were you doing till now was wrong and is bad in all perspectives then seek external help. It needs strong will and clear vision driven by inner will and you can get rid of gambling addiction over the time.
Of course any addiction is easy to get addicted to but but difficult to get rid of. A person who understands the ill-effects of gambling and how it harms them and their family can control their emotions and decrease their gambling habits. However a person does need constant motivation and support to help them get over the situation and to control the guilt associated with it.