The answer is very simple. You gotta see people who are even lesser than you and feel happy and fortunate for yourself. Just imagine, the 2nd richest guy in the world who has shit loads of money that he can buy anything and everything on this planet is still poorer when compared to the 1st on the spot. But that doesn't make him poor.

Similarly, you will always have million above you but ten hundred millions below you as well. Rather than comparing yourself with the higher ones and thinking of what you don't have, compare yourself to the ones beneath you and feel happy about what all you have.