I can understand; as gamblers, we get tempted to place bets. The best way to counter this is to set a profit limit or target. Once the target is achieved, make the withdrawal. If you keep your balance in the casino, then you will eventually get the temptation to place a bet and will continuously want to make more money. Hence the best thing is to just withdraw the funds after a certain amount is made in profits. Withdraw the initial amount you used, and if you really want, then gamble with the previous game’s profits.
That is how I always do but it's not actually easy for an addict to overcome that as he will tempted to keep gambling in order to get more profit which might result more loss and it's hard to control or stop even when they don't want to gamble again.
So it's important to seek for help or support from anyone who we trust that might help us either from any experience counsellor or from our loved ones which can help us to stop or limit the way we gamble.