Boyfriend wanting a baby

Jessica
Hello, I'm 23 and my boyfriend is 25. 
He keeps on telling me how he wants a baby girl, how he wants to put her in cute dresses and tutu's and look out for her, and make sure no one breaks her heart or turns her smile into a frown, and he'd always be there when she cries. 
He has been saying this for the past 2 years now, we've been together for almost 6 years now and I don't know if I should do this or not?