Back in the day, in my 20's, I was extremely jealous. Then again, at that time my boyfriend cheated on me multiple times. There was a period of a few of those years that I was addicited to him.
After him, I never had a problem with anyone I dated, was intimate with, or married to. I guess I learned my own worth.
As far as being jealous of others possessions, their apparant lifestyle, etc....not after I learned the heartaches and problems some people had, whose lives looked perfect on the surface.
Jealousy takes up too much energy.
It's like the Tracy Chapman song says...
"This youthful heart can love you, and give you what you need.
But I'm too old to go chasing you around, wasting my precious energy."