Jealousy distorts reality. It becomes a lens through which the victim appears larger, more powerful than they are. If I am jealous, want you only for my own, I will notice everything you do and interpret everything you do and say as if it is connected to what you think and feel about me. I will read meaning never intended by your words or behavior.
The power to choose is essential to love. If removed, love ceases. Jealousy poisons choice and love. It robs a jealous person of the very love they think their jealousy will protect.
Jealousy makes people most unattractive. A jealous person can operate in this manner for so long that jealousy seems essential to their personality. They appear to know no other way to operate.
Unchecked (unmonitored, uncontrolled) jealousy will act as temporary glue, or repel your lover from you, or set you both on a course of anger and resentment. There are no positive rewards except the temporary, illusion of power jealousy offers.
If you think jealousy will keep someone with you, you have failed to see that the very act of ensuring someone be yours forever, is the removal from that person of the very essence of love – freedom to choose.