I don't know what to do

My boyfriend and I want a future together and I'm happy with him and he asked me about kids.

I only want 2 or 3 and he wants 5 or 6. He comes from a large Dutch family (no disrespect to anyone who is Dutch! )and his mom even told me that they are to fruitful and multiply. My boyfriend has a total of 9 brothers and sisters and he has tons and tons of cousins. It's normal apparently for the Dutch to have a large family.

But I don't want a huge family. And I want to keep working. What should I do???