I presume we must do everything not to become addicted neither to forex nor to other things, cause addiction is harmful in any case. It leads to losing control over your thoughts and emotions and that's why there are such traders who lose money and come back agind and again.
The best way to treat forex - treat it like a job, or self-employment, cause sometimes you will have lose, they are inevitable, like imagine you have a small business that can possibly generate solid sums of money, but at the same time, when the demand is low - you'll have losses.