Honestly, it's hard to judge where she was coming from not knowing her a) past history and b) tone of voice. That's sounds just like something I would have said to a close friend as a joke. Jealousy is not always hateful, I can freely admit to a good friend that I'm COMPLETELY jealous when they get to do something I want to do. I don't feel hate or wish they weren't getting it, I'm glad for what they have or are going to experience. With my friends/family it wouldn't be anything to say, "Wow, are you serious, you get to do _____ ?! That's awesome. You suck!" (must be understood that that last sentence is sort of common joking with my friends/family, so don't freak out). Then they'll usually say something like, "I know, I really really do!" In fact, this weekend someone said that they were staying at a beach house for a few weeks, and laughing, I said, "Wow, must be hard!" They grinned and said, "Oh yes, we're really suffering, but we are going to tough it out!"
Just the other day I friend of mine finally bought the luxury car she'd been wanting. Another friend of ours said, "Well I don't know, can my lowly Honda-driving self ride in your car, or will it spit me out the back door?" She was just expressing admiration for the car and playing around. My friend with the new car laughed and promised her it would be fine, but she should buckle up just in case. But then, as I said, we have enough experience with each other to know the difference btwn teasing and true passive aggressiveness. I'm surprised with such a close friend of so many years you guys can't tease each other or your still unsure if she is actually teasing?