How to cope?

My bf is 22 and I'm 20. I know I'm young, but I know he's the love of my life and he feels the same way about me. But he says he never wants to get married or have children. Idk how to feel or cope with this. Will he change ? Idk its such a weird thing to feel. Especially when I see all the women talk about how he proposed or their kids. I really love him but it just makes me sad he feels this way about those topics.