Both my FH and I are only children and neither of us would change it for the world.
From my point of view I've seen tooooooo many families that have multiple children stretched tooooooo thin. I've seen siblings ignored and neglected, both on purpose and not on purpose.
My mom has one brother and my dad is the oldest of five boys and neither have significant relationships with their siblings. My dad only ever sees 2 of his brothers and my mom HATES her bother, let me change that, we all HATE her brother.
My mom is in the situation where her parents are getting older and she is now having to take care of them more. Her brother is NEVER around and NEVER helps out. 5 years ago my grandfather had a heart attack and my mom moved in for 6 weeks to help out because my grandmother is incapable of taking care of herself, then last year my grandfather had both his knees replaced, again my mom stepped up and moved in for 4 weeks to help out. My uncle is too damn self involved to lend any type of "helping hand". He's so oblivious that he doesn't even understand how sick his own mother is and how severe her condition is. So having brothers and sisters around to help out when our parents get old is a beauty idea, but sometimes it doesn't work like that.
Sure there were times when I was younger where I got lonely, but I could probably count those times on one hand, there weren't many. I had loving parents, great friends, and a very vivid imagination.
I charish the fact that I'm an only child. I don't have to share my parents' love with anyone else. But I also consider myself VERY LUCKY. My parents had to try for 3 years to have me and they decided to quit while they were ahead and because of that I was born into a family of love, where I was the center of my parents' universe.
My FH on the other hand was born to parents that should never have had children, sad to say I know. But they are very selfish, inconsiderate people, they only had him because they got pregnant, they didn't plan on having children.
My FH and I plan on only having 1 child, we both agree that we want one child to shower with love and affection and let be the center of our universe. I can understand where some of you are coming from, feeling resented or alone as your parents age, but I don't have any worries about things like that. I know that in the future it may be tough being the only one around, but I know that there will be no one else on this planet that loves my parents more than I do, to do the job of taking care of them as they age or pass away and I know that they will be taken care of in a proper and loving way.
Wow that was long!!!!!!!!!!!!!!!!!!!!!!!!!