As long as you don't play too long and you are winning and cashed it out, you are technically a winner.
However, if you play longer time and even while having lots of winning already, tendency is you are going to lose because of the house edge advantage.
it's really hard to quit when winning that is why there are more losers than winners. i have experienced it plenty of times, there is no winning in gambling except for the house.
If you have experienced it many times, it means you have never learned from the mistakes you have experienced and you continue to fall in the same hole. Try to control yourself for the better, so that you will no longer be controlled by great greed in your soul.