I am an only child, and dh and I have an only child.
We decided this for several reasons, most in the forefront being that after having one, neither of us had the sincere desire to have another. And I truly believe that having children should be done with that utmost desire for one.
I've heard many comments such as 'you're selfish,' and 'your son will be lonely,' along with the really personal comments questioning our decision. I just can't imagine questioning outright those who have made different childbearing decisions than we.

I never really gave Chris being 'an only' a second thought, mainly because I was one and loved it. Dh has two brothers and sisters to whom he is not at all close, so he really never was worried abut the sibling thing either.
Bottom line, we were happy with our little family, and just had no deep, true desire for more children--now I'm not saying that if we would've had an unplanned preganancy we wouldn't have welcomed the child, but I can honestly say we don't regret having only one.
Follow your heart on this one--'onlies' do just fine, and I certainly wouldn't make the decision to have other kids based on that concern alone. What works for one family won't work for another, and I do hope you make the decision that's best for you and yours.
