Have you try experimenting this on yourself about how you react to things in a monthly basis? Em.. okay let say weekly one also okay. Mmm.. probably you could check your mood swing. I am happy when ... I am sad when.... I am lonely when... i am busy when... and how do you react to it and when and what time to be exact during the day?
Why not have a diary... if you really seriously want to find out. Maybe you say this to yourself.. I don't have time to do all that.. So that's why.
Do you like to be busy or do you like to be lazy? Hahha... it all depends ah. I can hear voices said 'it all depends..' . Hahah. Oh well... Happy working. But do take rest in between and have time to think too. Don't get worn out.