Get knocked up, that should do it.
OK, that was probably out of line, but all joking aside, by nature I can be a very jealous and bitter person, so I completely understand your feelings. It's really hard to deal with most of the time, especially if you already tend to have low self esteem issues, which I certainly lean towards as well. When I get bent out of shape about seeing other girls with better wedding pictures, going on HMs when I didn't, contemporaries making more money than I do, living in nice big houses straight after the wedding whereas I do not, being generally prettier than I am, having 'charmed' lives with husbands that actually seem to love them and having babies and being happy, when I feel I'm poor, ugly, and unloved, and gypped, it's really hard to come out of that funk.
Right now I'm dealing with someone who has a really big chip on their shoulder and is doing some viciously immature things to me, because they're taking personal offense to something that has nothing to do with them. I.e., a jealous freakout. And I see how ugly that looks, and how everyone is rolling their eyes at them, and then I realize that that's probably what people do to ME when I get that way. So that's a really good way to try to snap out of it...take a step back and think about how you react towards people when they get in a jealous rage, and think to yourself, would I want people reacting that way to me? With a combination of pity and contempt?
Another thing I try to do when I get down on myself with jealousy, even though it's really petty, it kind of helps... You don't ALWAYS have to be PC and goodie...sometimes, you just need to take care of yourself emotionally, regardless of the means...but I say to myself, ok, I'm jealous of this person because of X (they make more money, they're prettier, they have things I don't, etc.)...but this is why I'M better (I'm the favored in the family, *I* make more money, I'm smarter, I'm thinner, etc. Like I said, it's not a very NICE way of dealing with the jealousy...but if it even temporarily makes yourself feel better about yourself, it usually eradicates the jealousy. They might have a baby, but I have a career. They might have a house but are house poor whereas I'm comfortable and can come and go as I please and treat myself to restaurants, clothing, etc.
I know this was really long, but it's funny that you mentioned this because I'm really struggling with the same issues right now too, so it struck a nerve. If you need to vent, please FM me!