My boyfriend has 2 kids. should i stay

i’ve been with my man for about 5 months now. He has a 5 and seven year old from his ex wife.

i don’t know if i can continue on with the relationship because i feel so secondary.

i don’t know if this is normal or if i have issues.

i’ve never met his kids of even seen pictures of them but i have asked to see pics of them but he never shows me.

i love him and he treats me like a Queen, i have never met someone like him, he even helps me with my bills every month and with anything i need but the idea of me coming second to them my whole life makes me sad and idk if i want that.

should i stay or leave?