Maybe just try to focus on your fundamental needs and interests and satisfying them, rather than the broader view taking in all different influences like your religion for example, and what other people are doing. Unfortunately I can only offer advice from an entirely non-religious viewpoint, but I think some of the concepts of jealousy and dealing with such situations still apply. I think that when we are angry for example, when jealous, we exhume a lot of mental energy with negative thinking. Instead, perhaps, its better to channel that energy on thinking how you can improve yourself rather than concentrating on what other people are doing and therefore feeling weakened by it.