People never see bets as something they can be calm about, the fact of having a bet in itself already makes them nervous, then we know gamblers as people who don't know how to stop even when there is an interesting amount at stake
Not all gamblers; some actually do know when to stop. When their interest is at stake, you can’t allow your pride in not accepting defeat to lead you to losing an amount which you will leave to regret in the next few months. Those who don’t know when to stop are already down to the addiction level, and gamblers that still have responsibility left in them can leave when they see the sign.
If those people don't know how to stop gambling, they will just deeper into gambling. They will difficult to get out from gambling because their minds are already stuck to gambling. And yes, those people can be addicted to gambling especially if they don't know when to stop gambling. If you see your bankroll is down, you must think to stop gambling immediately. No use in gambling while your money are keep reducing. If you care about yourself and want to avoid the gambling addiction, you should leave gambling immediately.