I'm really jealous of her--she has such a nice house.
Shouldn't the correct word be "envious"? I think it should (according to how they used to be delineated). You're envious of what people achieve, have, do, etc. Jealousy means something else--it has to do with love and devotion. For instance:
I'm really jealous of her--she is going out with the guy I've fallen in love with.
The speaker is jealous because the guy she likes is with someone else--it's a heart issue.
I tried to seek out the answer online, but there are conflicting opinions. So I'm wondering if the English language is again in a state of flux with these words (as has happened many times throughout its development).