Jealousy has its toll.

I just realized, I am a very jealous person. I have always known I have the tendency to be jealous once in awhile, but lately it has been all the time. I always seem to want what she has or what he has or what they have. Not in terms of what they have as in material things but other ways. When ever I start to think I have a grasp on what she or he or they have, it all fails and I am left to be jealous once more. I wish I could just stop being jealous of what they all have and just be happy with what I have, or don't have. It's stressing me out and I need to fix it. I don't know how though.