I don't understand why someone who has quit will ever go back to gambling. It's like other vices, if you quit smoking, then good, no reason to go back to it. And it just will add another pain in your life if you have quit then go back for some reasons only known to you.
Just be resilient and find out the demons that once conquered you. Man enough and don't like others or the environment around you influence your life. If you are stress in your life then go and exercise. If you have under been peer pressure then move out. If you frequently see casinos, then go and move on a different route.
The urge to gamble again is certainly real, especially since winning can be addictive. It's not surprising, then, that someone who has stopped gambling for a long time might return to it, whether just for fun or to make a profit. Even those with good self-control might return to gambling with limits, but the risk of addiction remains. A good suggestion: when we're stressed, exercising is the most appropriate thing to do. If we're stressed, but gambling isn't the right choice, it's the wrong one, as it can make our situation even more stressful and increase the likelihood of losing.
The right dose of gambling can indeed alleviate boredom and stress, but this isn't a measure people should mostly consider due to the addictive nature of gambling, on the process of stress alleviation, you could end up causing yourself more trouble just as you said, and instead of actually getting rid of the stress, you end up adding to it. In opinion, those who have high chances of actually using gambling as a reliable means of alleviating stress and tension are those who are responsible gamblers and those who already have good sources of income and are very satisfied with their incomes, because they'll have absolutely no need to want to generate extra income through gambling.