Jealousy is the Root of All Evil?

I have problem with jealously. I'm not usually too jealous of material things. I can't say that I sometimes wish that I have material things that other people have, but it's not something that really bothers me usually. I get crazy jealous about the talents that other people have. I don't think of myself as really talented in any way. I find myself obsessing over what other people can do and what I can't do. It takes over my mind sometimes and I'm just a totally different person. It makes me such a negative person. I know I shouldn't be negative and it's really not a likable quality but it is so hard sometimes. I just need to think positive thoughts and not worry so much about other people.

Also, because I get so jealous of others I sometimes get a feeling kind of like joy when I see talented people fail. That is so awful. Why do I think that way? I know I need to stop obsessing.