Jealousy in romance is like salt in food. A little can enhance the savor, but too much can spoil the pleasure and, under certain circumstances, can be life-threatening.
The desire to create continually is vulgar and betrays jealousy, envy, ambition. If one is something one really does not need to make anything --and one nonetheless does very much. There exists above the ''productive'' man a yet higher species.
Love shouldn't be about jealousy or anything like that. It should be about commitment and being able to trust that person. If you can't have that from the get-go, there's a problem.