I'm not exactly sure what you are asking, but Ill do my best to explain. Assuming I read your post right. The reason I don't lose my mind, is cause...
1. I never play with money I cant afford to lose.
2. I have a level of understanding of the game, or games. If I were to loose, I know I either played it right, or I made a bad play. If I made a bad play or read, typically I will rebuy, continue to play, take my notes, and try again. If I got it in right, and I lose. Then luck is not on my side and I stop.
Now as for getting addicted. It's funny you brought that up. From the age of 21-till about 25 I lost about 10k lifetime. I couldn't stop, obviously had a problem, and refused to do what it took to get better. Finally I gave it up at 25. Then right around when I turned 30, I decided to try playing again. I was in a better spot in my life, had some extra income coming in, and felt comfortable playing with money I could loose. This time though, I vowed to actually learn the game, get some coaching, train myself to review hands, and actually get better...
Since then as of Jan. of this year. (I, 35 now) I have made back everything I lost during the time I could say I was "addicted".
I hope that help clear up a little confusion for you.