happiness

it's been a while since i post my last blog...i'm sitting in seoul and doing too much...and thinking too much...all i can think of is "i'm tired"...i have been working days and night since i got here in korea. working with a company in california and of course working for my own business here in korea daytime...because i love being busy, i thought i was happy for this much of work...but now it's out of that point...and i wonder is the happiness real? or the illusion...i tried to do something that i thought makes me happy, however, still i'm not happy...happiness is only for just a few sec? or doesn't exist at all? or it's just self convinced concept?