Every gambler must learn how to have a control over their gambling habits, you don't have to let emotions or excitements to determine your actions. To achieve self control in gambling you need to have a responsible strategy and be disciplined to stick with it. I once read a book titled '7 habits of highly effective people' and the author emphasized that to be effective you need to be proactive instead of being reactive. Gamblers who let excitement to influence their decisions are reactive people while those that have a plan on how to react are proactive people. Have a budget for your gambling bankroll and stick to it, additionally it's best to let the amount be what you can afford to loose.
Emotional management is not a feature to miss out when practicing responsible Gambling.For some Gamblers, emotional management feels really difficult for them to it's has lead some astray from feeling isolated and giving unrealistic expectations.While some depends on Gambling to escape real life situations;and these are emotional wreckers indeed.
Gambling to escape reality is the worst situation to be in, it can lead to a heavy dependency issue that will only get worse because they have placed too much relevance in this destructive habit. Gambling without emotional management can be very dangerous, as a gambler you are not even supposed to allow gambling control your emotions. If it gets to the point where gambling makes you happy and can also make you depressed then just know that it has a huge impact on your mind.
If a person can control his emotions and have that kind of mindset where he can only spend a budget amount and nothing else, those people might find some enjoyment and kill boredom, though it's only few people who can do that, some really practice things well and others are been move to do it becuase of thier past experienced.
I agree with your last statement if gambling already affecting you bringing emotional swing it's best to weight in and see if you still can handle the pressure and still able to balance both your mental and financial capabilities.