best answer i’ve always heard was: would you rather be them with all their problems also or you? also, i find that those times where i am most being me – using my strengths, talents, spiritual abilities – i’m not jealous. but when i’mm not happy with myself and not fulfilling my tachlis, i can be filled with jealousy.
jealousy can also be useful – the things you are jealous of reveal what you want to be: use that info. to develop yourself