You will need to get some professional help because I do not really know how to get someone to with with gambling.
That person is going to guide you and you should approach it the best way.
There is no use when a gambler is not willing to quit gambling by heart-fully. Yes, without own interest no one will be able to quit gambling. Even after a strong will of quitting, many gamblers are struggling to achieve that because of their long-term addictions towards gambling. But proper support from family, friends and professional doctors anyone can quit gambling.
Yes, how long the duration that you are staying with gambling addictions, the harder you will find while quitting gambling. Basically quitting gambling is not a single day action. You need to react very progressively day by day on reducing your hours of playing gambling. Only a strong will is enough for that IMHO.