He's been obsessed with the idea of starting a family for a few months now. We're only 18, graduating h.s in a couple weeks. I think it's too early...way way to early. It just seems strange to me. Never have I ever heard of a 18 year old guy so eager for fatherhood. This may sound stereotypical, but aren't teenage guys supposed to want to go out and party? not stay home with kids?

Please don't give in to his wish though you are way too young but don't get freaked out either. I think that when he realizes that the relationship and your feelings are serious (assuming they are) he'll probably forget about it.