I have realised that most gamblers don't prepare for losing.
What I mean by preparing for losing is that they should know beforehand that they might either win or lose, so they only gamble with an amount they won't cry over. If they can prepare well for any outcome, managing the emotions that come with losing will not be a big deal. But with high expectations of winning, the feeling of losing will hurt even more.
That's the problem when you gamble an amount you can't afford to lose, yes, it falls into that category that you gamble an amount you can't afford to lose.
In the first place, why are you not prepared for losses in gambling?
How sure are you that you will win each round of the game, and don't overlook the other side's outcome?
Managing emotions always starts with how you discipline yourself.
Set a stop-limit amount that you can afford for gambling, so even if you lose, you know your limitations.
Handling losses is very important, if you don't know this, and might chasing your losses will come that easily to wipe out your entire money.