He's asking again

Tonight as I was putting Kristopher to bed, he was avoiding going to sleep. He started asking me about why his friends can have a new baby but we can't. I was kinda shocked because he hasn't really asked about babies in a while. I thought for a second, then I said that we are still working on a lot of stuff with the house and that a baby wouldn't have a nice room just yet. He said "oh. Well maybe we should hurry up with this stuff then!" Yes, I agree there... I tried to change the subject but he kept asking questions.
"Well, couldn't the baby sleep in your room? I did when I was really tiny right?" I said he did, and that he also had a room of his own. It caught me really off guard so I was just using the construction craziness as my coverup. And kept trying to redirect his thoughts onto other things.
"I think we really need a baby to keep. Maybe a boy. Wouldn't that be fun?" Little pause. "Then we could name him Kristopher too. Then there will be 2 Kristophers. Then we could say hi to each other and play and I'd share my toys and..." I told him I think it's a great idea, but a baby wouldn't be named Kristopher too because that's his name and it's special just for him. We would have to think of a new name. I finally got him distracted with ideas about going somewhere on Thursday and he will get to play with a friend for a few hours. He's very excited about that. Right before I left the room, he said he really hopes we can bring a baby here to keep soon. He's "lonely and sad".
He's so sweet and sensitive at times. He loves babies. He is probably the most hyper kid I've been around, but he calms down right away and is so gentle and careful near a baby. He just loves them. A few months ago, I helped a friend out when her normal sitter was sick. He thought it was the coolest thing that we got to babysit. He cried when they took her home. All his friends has brothers and sisters, or a new baby on the way. His cousins have brothers. He sees how everyone else has people around all the time. He told me "Zoey is my sister right? She plays with me but won't play with my toys too. I want to play with my toys sometimes". (Zoey is our dog)
It breaks my heart to know he is thinking about babies too. And I don't like that he is "lonely and sad". I wish there was someone for him to play with more regularly. There really isn't anyone with kids around here that we get along with. My husband's brothers and sister, we do not get along with and their kids constantly pick and try to torture ours, so we avoid them.

Seriously made me cry after I left his room. I hate that it has to be so hard. It's hard on all of us and I just didn't realize he felt it. I really hope it works soon.