We all experience the same problems, whether it's about our family, friends, school or love. No problem is bigger nor heavier compared to other people because He is not unfair. He is just and full of wisdom to know that it is stupid to lighten other people's burden while others suffer on a heavier load.
There really is no difference in the degree of difficulty-- it all depends on attitude, how you accept a problem and how you act on it.
So, if one day you think that you are carrying the problems of the whole world... think again. When you say that someone's problem is too little to become such a worrier, I say you shut your mouth. What problem that seems minute for you, might mean the whole universe for him.