Another mum of an only. DS is an only because I am an older mum and we knew from the start that, if we were blessed with a child, he or she would be an only child.
I have two siblings and two of us fought like cat and dog for almost all our lives! I am the eldest and missed out on weekend school trips because money was tight. I remember saying to my mum I'd have a better childhood if it wasn't for those two (because she told me I couldn't go on a Calais trip as she had to buy three school uniforms). I felt so resentful that we couldn't have the foreign holidays my friends had because there were five mouths to feed on pretty small wages.
Yes, it was nice having company and being able to have someone to play with when it was raining but there are four years between me and the youngest so that 'play' soon wore off and she became a bloody nuisance when I was 13 and she was 9!
DS has loads of friends - I made extra sure we accepted every flipping play date invitation when he was younger and it's paid off. He is doing well at school, at six years old he had a reading age of 12 (I know lots of kids have this but I think, for him, it was because we both spent time reading and playing word games - not for the education, but for the fun) I and DH wouldn't have had that time if we had another child.
We've travelled with him, a lot. We did a lot of it when he was in pre school. If he had a younger sibling I don't think we'd have done it as one trip was to Australia. Hard with an almost four year old, very hard if we had had two under four years.
He is bright, he is great company, he has a good life, he also has temper tantrums to raise the roof so is no saint! But he's our boy and we enjoy his company a lot. It's great seeing him grow up and having the time to enjoy every minute of it - blink and it's gone. There are many, many blessings having just one.
One of my best friends is an only child. She and her husband, another only, made the conscious decision to have an only child themselves as their childhoods were great (and she lost her dad when she was six so you'd think that would have marred everything but she and her mum are very close)
I'll leave the last word to DS. A few months ago we went to a friend's house to play. The friend has a younger brother and, before the time was over, they were at each other's throat. DS and I came home and DH asked how we had got on. DS's reply? "Great dad but I'm glad I don't have a brother! Ah, peace and quiet at last, can I watch a lego you tube?" Says it all really.
Your family is your family. Don't worry about others opinions. Enjoy your son he sounds wonderful and you should be proud of the child you've produced.