Losing is very hard to rub off, especially when you lose a lot of money in one night, I can easily rub it off now but when I was starting out it was hard for me.
I have a friend who always shows signs of obvious loss in gambling, and he always shows body signs like he doesn't want to talk to anyone and always looks far, always trips himself because his mind is wandering.
Now, do you have a body sign that people around you can tell if you lose money in gambling, I'm sure all of us have one, be honest with yourself

When I notice that I am thinking about money losses rather than profits, my body automatically tells me that I have reached the elastic limit and should take a break. It's not a big deal to feel upset about loss, yes, the agony of things not going as planned can be awful at times, but you must learn from your mistakes and grow in areas where you fall short. There are also losses that were meant to ruin my day sometimes, but I managed to convince myself that it is what it is, laugh it off, you can't change what has happened.