As long as they desire not to feel that "remorse" anymore and don't want to gamble anymore, regret is what they do and they really won't come close to gambling even if they are invited to gamble by their friends. But if the "remorse" only occurs when they are done gambling because they have suffered a loss but still want to return to gambling, it is not truly remorse coming from their heart. It's just a regret for having lost the money they used to gamble and they will try to do better next time. But the next opportunity probably wouldn't change the outcome, so they better consider accepting it.
Once the gambler,always the gambler.So he can control for some times,but it won't be longer one.I had a gambler friends in very big circle.In that circle one guy had decided to quit the gambling and he deleted his casino account.Then he went to our weekly party,in that place my friends had asked them for the offline gambling.But he refused their offer,then they offer him to play the game without money and get the win if he win.After some minutes he agreed to play the gambling,the new gambling is not for the free game.This is because of his addiction.