Jealousy comes from counting others' blessings instead of our own. So very true, don't let your life pass by while you worry about someone else, count your blessings, be grateful, be happy for others (even though it can be hard).
People say "I don't care how I dress because it's not fair for someone to judge you by what you wear." But here's the thing. The way you dress DOES reflect part of you, and who you are, and what you like. And more than that, the way you dress affects you.