Only Child Syndrome

My lot of life is something I didn't choose.
I am an only child.

Growing up it was a blessing and curse. Because I was an only child I never went without- I was spoiled rotten- I almost always got what I wanted/needed. I had my parents to myself. I was the center of their universe, which was great as a kid. If I wanted to go somewhere or do something there was no sibling to disagree with me or to have to share with.
This is no truer then when I was 8 and visited my cousins in Pittsburgh for a summer- it was painful sharing and to this day I remember that. Thankfully a little age does wonders!
However if you asked me today- I hated being an only child. I missed having a built in playmate that was around 24/7!
When you are an only child you are treated like a mini adult your whole life, I have always found being around adults comfortable and never had a problem relating to them. I also am very comfortable being alone. I've been to movies alone and went on vacation all by myself. I love me time. In fact, I need alone time to balance myself out.
I hate to admit but I know that sometimes I have a moment of OCS 'only child syndrome' in which I have to remind myself that while I think the world is my oyster there are others around me. I'm interested to see if other only children feel this way or not. Please comment if you are an only child I'd love to hear your thoughts!