There is really no need to become psychologically affected upon losing.
It's only easy to say because you're not in the shoes of other people even if you're ready to lose you can't avoid the feeling of regret,stress etc.
It's not easy to prevent sadness when we are losing money in gambling, but that is the risk that we should face it. I am sure that we can cure the feeling and we can be back to play another game at the other time.
So I think to prevent from getting a bad feeling in the gambling, there is no other way than to limit the money and only play in the short time because if we decide to play in a long time, then we will lose more money and that will make us very sad.
There is a way for not getting sad when we are losing money is we need to know how to make more money in our life and just come here to spend on gambling and also trying our luck to make more money.It may sound crazy that we have to work hard to make money just to spend on gamblig but this is the way gambling was designed so you have not to be afraid of losing money.