2. Get them to know each other better
You could also suggest spending more time together so your family can get to know him better. Look for common interests like food or music to bring everyone together.
Seeing you more as a couple will maybe help them accept the situation. If they witness the depth of his love and care for you, their opinion may begin to change positively.
But if the relationship is causing too much trouble with your family, you might want to step back and focus on building a bond with your partner while you sort things out, if possible.