My parents say only marrying a foreigner will make me happy

My [Vietnamese] boyfriend and I started dating five years ago after knowing each other in Taiwan. We recently returned to Vietnam and ran our own businesses.

Everyone in his family likes me, but my parents are not satisfied with him. They say he is immature, and they are afraid that I will have to take care of his four single aunts, in addition to his parents, if we get married.

Despite that, I think it will not be that bad, as we are living in a modern era when the relationship between a woman and her in-laws has become easier.

Since many of my relatives have gotten married to foreign men, my mother suggests that I should marry a foreigner too if I want a happy life. On the one hand, I understand her point of view and I want her to not have to worry about my life.

On the other hand, I do not want people to nitpick over my decision. I am afraid that I will make the wrong decision and regret my choice of husband in the future as well.

What should I do?