Dear LIB Readers: He Wants Children, I Don't.

I am a divorced mother of three. I have been dating this wonderful guy since last year and now he wants us to get married. He has no children of his own and he says he wants at least two.The problem is, I don't want any more children, besides I just turned forty. I don't want to lose him because he loves me, he's good to my children, and he's a good man. Good men are so hard to find these days, but I can't give him what he wants. What do I do? Please share my dilemma with your readers. I need advice.