Bf doesn’t want more kids

Me and my bd have been dating 2 years . A happy 2 years . He has a boy and girl by another woman and I have a girl by another man . I told him I want a son last year and he’s like ok he’ll give me one for our 2 year anniversary . 2 years and 4 months in i ask again And now he’s saying he has a boy and a girl already (by someone else) and doesn’t want anymore ...I also have a girl by someone else but I want a boy .

We are financially set and we have a 3 bedroom house .

He claims he’s serious and doesn’t want more . Should I wait it out or leave him ?