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There is no such thing as finding closure in gambling unless the person decided to quit gambling. A gambler does not need to find closure, he must provide and decide for it himself. Because if he looks for it on his gameplay, he will never find it anyway, he will keep on gambling until he is broke.
Once you are addicted it is hard to find closure unless you get help which is a sketchy situation if no one is there to guide you and gambling online can create that unfortunate situation. Unless you set a monthly budget, you would probably end up loosing everything.
Just telling that it is a closure for sure he got addicted to gambling it is just his reasons so that bo one can stop him. Mindset of addicted to gambling is very difficult they already have all the reason to play and not to stop you . No matter if you have a monthly budget or not addiction is really addiction and it needed to be cured and seek help for professional as it might go worse