you cant control others, to do such a thing is impossible, they must change on their own, jealousy is a vile elixer that only taints one's mind, as long as you do not allow yourself to be jealous, then you can simply tune out the people in your life who allow it to taint them, if you can offer them a way out, then great, if you cant, then dont attempt to offer your hand, you will simply be pulled in, and you will drown with them
Jealousy is an emotional response. It is impossible to control your emotions. What a person CAN do is control their actions. We do not have to let our emotions dictate our response. It is possible to feel jealous and still act in a reasonable and responsible way, and I have.