Please!!! Need words of encouragement

I am and he 2 year relationship with the love of my life. I have a son and he has 4 children himself. 2 of his children are now adults and no longer live with us. So yeah, 3 children in the home. When we started dating, I was always very truthful about My desire to have another child and he expressed that this was something he wanted too, every time I bring it up now he keeps saying that our family isn't ready and we should wait. We should have more money and now's not the right time. I know that 2 of our children at home wouldn't care if we had another kid and and one is a teenager, so it's inconvenient for them, so they don't want us to

It's really been getting to me lately that I feel that he just keeps pushing the wait and wait until conveniently, it would no longer be an option. So I just needed some words of encouragement in.I guess advice for this.