Stubborn

I am pretty stubborn. Actually the most stubborn person I have met. I dont know it is a problem or not, but sometime when I start doing something I cant stop. Even after the end (if there is any well defined end for anything in this world). Whole night I tried to solve one problem. I thought it will be the best problem I have ever solved in my life, got stuck for 3 hours, and then again read the statement of the problem and found that I was trying to prove stronger result which might not be true. Anyway the problem is solved now, after a long time I solved exercises. It feels nice to do this once in a while or all the time. Why can't I have a life where I dont have to care about booking tickets, carrying passports, thinking about food. I mean I can work 24 hours per day if I dont get depressed. Depression can be avoided if you dont take part in outside world activity. But then all these regular work forces me to take part. That problem is solved but not the stronger hypothesis, and now i can't sleep. It is still working on my mind. Its hot, humid and i am sleepless, also i have an exam today. I dont want to leave my table today.