Hello anhtt113 and welcome. Well done on looking for help. Read the other stories here. You will read a lot of things that you will relate to, you will also read the success stories – what are they doing that you can apply to your own situation?
Payday Friday? So what can you do between now and then that will make you less likely to gamble? Give your paycheck to your wife? Make arrangements so that it is paid into an account that only she has access to? Get self excluded from the casino you plan tp gamble in? Find your local Gamblers Anonymous meeting?
It sounds like your wife will have heard all the promises in the past. No reason for her to believe you mean to stop now really is there? The above actions will both help you stop gambling and also might give her reason to think “Hey, maybe he means it this time”
Keep posting and let us know what positive actions you are taking.