thoughts?

Okay so I definitely want a baby in my 20's but my boyfriend doesn't think he wants a baby because his family has a not so great medical history. It shocked me... kinda hurt because I've voiced how much I want a baby by 25 if he and I were to stay together.... I dunno how to talk to him about it with out tearing up. He and I have daydreamed over and over about what our kids would look like and names and all the baby things I can think of... I don't know what my question is .. I guess just some thoughts would be great!