嫉妒是贬义的，羡慕是褒义的。羡慕更多的是是指看到别人有的希望自己也有，是一种善意的感情。嫉妒是一种破坏别人的感情，略带恶意。

羨慕 和 嫉妒 互為反義詞 無可否認 嫉妒 是一種負面情感 但恕本人不認同 羨慕 是褒義詞的說法 也均不適用於浪漫場合 羨慕 : 心中愛慕渴望。 「他事業成功，又娶得如花美眷，真叫人羨慕。」 「丁伯伯一家三代同堂，享受著令人羨慕的天倫之樂。」 「賢伉儷鶼鰈情深，令人羨慕。」 「別羨慕他們， 其實你比他們更好。」 「羨慕別人，就是在否定自已。」 「羨慕是使人不快樂的原因之一。」 嫉妒 : 因他人勝過自己而心生妒恨的心理狀態。 「俗稱善於嫉妒的人為『醋罐子』」。 「白雪公主因受後母嫉妒，而遭受陷害。」 「『匹夫無罪，懷璧其罪。』 這句話後來用以比喻懷才而遭人嫉妒陷害。」 這裡有更詳盡的說明 http://zh.wikipedia.org/zh-tw/%E7%BE%A8%E6%85%95

嫉妒是羡慕的衍生词。嫉妒比羡慕程度更为强烈，羡慕可以是褒义，但是嫉妒是贬义词

I think they are more or less, same thing, when something is limited, occupied by few persons, you feel jealous against your competitors, when something is infinite, like the air, the daily drinks and meals, you won't feel jealousy at all. I admire my cousin in New Zealand who smell better air, but it's meaningless, I won't go there because I admire the air there.

嫉妒 jealous 羡慕 admire in Chinese culture, especially for women ethics in loving relationship, especially for well educated women, it's better to endure rather than showing your jealousy and giving your lover pressure. And high EQ women understand that by facing your rival in love that way usually expose your fear and weakness too early and has no advance for you at all. But I am low EQ...direct , violent and mad. What a pity