Jealousy or just what

.Is Jealousy insecurity?  Does it mean people who are happy and all don't get jealous?  I'm like here looking, laying on my bed, and typing this message .

I've been made to believe that Jealousy was a sign you are insecure.. You are joking right?
If you love something or someone you shall protect it or him or her.

When there's NEED for it.

Don't try to protect it before the danger comes or else you become the danger.

Everyone gets jealous. Everyone acts differently.