Yeah, at 17, it obviously seems too young to start a family if it gets a bit serious.. and you don't want to start taking on a 'mother' role or anything. He's still young also so he'll be looking for someone nice to be who he can have fun with like a normal relationship but someone who can accept his child. It depends on what your both looking for :) No matter what, his child will come into it because its his kid... but if hes a decent enough guy he'll understand how you feel about it and I'm sure you can work around things.
If your thinking about going a bit further, try it out, see how it goes, if anything bothers you, let him know Don't stress too much :) xx
P.s. My parents have an 8 year age gap and they were very young when they met!
a friend of a friend. i dont know, i really like him it's just i think it would be too compilcated! do you? im still in school (i only turned 17 this month). dont get me wrong, i am realy good with kids, its just i dont want a 'ready made family'. and i think that is what it would be like becuse the kid lives with the guy