It doesn't the scale for a gambler to know that it is the time to stop when others are already affected with your hobby or addiction in playing. On before it happened then you should be mindful with the things that it will happen if you did not stop your playing activity,
It is time to stop :
1) When your friends or family start complaining that you are not giving them proper attention and time because o this habit.
2) If you start ignoring your responsibilities towards parents or children because of this, it is the time to stop.