Sometimes I use drawing as an outlet to satisfy my "want" for things. Like I love sweets. Sometimes I'll find a beautiful picture of a slice of cake and draw it rather than buying cake and eating it. Maybe you can find an artistic outlet to satisfy some of your cravings. BTW I'm a bad drawer and always was, but copying a clipart sketch off of the internet once a day gives me some satisfaction. And additionally, developing a skill you take pride in will help you value yourself regardless of your physical appearance. It could be anything, even just photography with your camera phone if you have one, or origami with newspaper. There's a materialistic satisfaction in creating an origami shape, drawing a picture, or taking a good photo. It certainly helps me spend less money!

Maybe there's a basis for your desire for things that you could slowly unravel. Sounds like you're already doing a lot of wrestling with yourself. I don't know if jealousy can maybe be a symptom of some childhood environment or experience, but if you keep on inspecting your feelings of jealousy and keep on trying to understand yourself, maybe you'll find some answers that can give you peace.