Success is isn't a race, it has a perfect timing, invested with hard-works and effort. Stop making comparison, so you can avoid jealousy and ruined a relationship. Don't be a bitter person for others success, no one deserves your bitterness. They're success was the fruit of their hard-works and if you don't like being left behind, double your efforts to have some progress. I just felt sad that people are competing each other because of jealousy.