I am 31 years of age, i weigh about 67 kilos, i eat about 100 g of chocolate a day, is it bad for my health in any way?

You're fine: Maybe somebody else will find some reason for concern but i certainly won't. Truth be told, life's too short and too difficult for us to trouble one another about things that do no obvious harm. If you're physically fit, not substance-abusing, have reasonable blood work ; are treating others decently, you're doing better than many of your peers. Enjoy your chocolate.