Hmm... NFs, or NFPs rather, seem more prone to envy than jealousy, or at least I am. I don't really care about possessions or achievement all that much in a way that would make me jealous of someone. I might wish to be more like someone, to look like them or have the same talent they have, but I'm not personally jealous of them, just envious of the talent and wishing I had it. With friends and loved ones, I can usually keep and jealous feelings that spring under control because I hate neediness in general.