Jealousy

"Jealousy is when you worry someone will take what you have. Envy is when you want what someone else has."

I am not a jealous person. I have nothing to give and therefore nothing anyone would want. I am however a very envious person. I envy people's happiness and their lives on a daily basis. I know it's horrible and an ugly emotion to keep harbouring but I honestly can't help it.

How do you deal with jealousy and envy? How do you keep it from consuming you?