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Jealousy in a relationship is the insecurity of the jealous partner and should not be transferred to the non-jealous partner as their problem. If you want to go on a witch hunt in a relationship, partner with a witch.
The continuance of a relationship where there is growth, depends on clearly defined needs and goals which are reviewed yearly.
A relationship is like two people jumping out of an airplane in one shared parachute. You both rely upon each other to make the journey safely, both will reassure each other and both will spontaneously share the delight of the journey.