it is a mind problem with addiction to gambling it is the will to stop or the the will to proceed most of gambling addicts pretend that they just doing it for fun without noticing that they already loses a huge amount, really have difficulty to say whether you are addicted or not.
It really is hard to tell if a person is addicted or not they would still not gonna say they are addicted because they themselves don't notice it, but even if they are addicted to gambling if they have the will to stop themselves from addiction other gamblers can pretty much stop themselves from it, but not all gamblers can deal with their addiction, there are still some addicted with gambling and getting a hard time coping up!
Addiction is a disease, so you would not notice it, the problem with addicted person is he is desperate enough to make money and will accept even if the chances of winning is too low. They would not notice as long as they have the money to gamble and only if they will become bankrupt which will disable them to gamble and force to stop.