Please try to develop some strong will to control yourself or else gambling can be very harmful.
I do agree, gambling have many negative effects if you're loosing too much money into it. You should stop when you realized already that your loosing huge amount and when the time comes that your already out of budget for your family, some instances that you'd even sold your house or car just to gamble. This is the worst case scenario if you don't stop gambling or you don't have control of it.
That is really hard for someone who is really addicted with gambling and if you are going to stop gambling and really want to quit already.
But when the it triggers that you want to gamble again then you can't help yourself but to gamble again.
I know a lot of person did already stop gambling but they can't stop it.