I read it this way....maybe right, maybe wrong.

When men behave like this (especially if the husband is a few years older than the wife) it means he is INSECURE.

He is afraid of losing you because either you will meet someone else where you work, or you will become less dependent upon him, or both.

In attempting to control you in this way he is laying the foundations for the break up of your marriage.

You are a young woman with your whole life ahead of you, not someone's closely guarded slave.

You do need to speak seriously to him, and I'd suggest seeing a marriage guidance counsellor if he will not relent from this selfish behaviour.