I'm not the jealous type, never have been, but I've noticed that when I do have bouts of jealousy it is because I'm lacking something. Usually contentment or I'm feeling insecure.

When I am content other people don't get to me. The girl thats smiling brightly, batting her lashes at my bf doesn't bug me,. I am content and have confidence in the fact that our relationship is too strong to be rocked by a smile. When I am content with myself I know that I am enough, I am not insecure. I am a good gf, a good friend, a good mother and I don't feel threatened by outside influences.

I think jelaousy is mainly frowned upon, not just because its unattractive but because its speaks volumes about the person emanating it.

Maybe look at what fuels your jealousy, what is the root of it, and then find a way to overcome it.