i always wondered how it would be like to be an only child, someone with no siblings
You must have brothers, sisters, or both! Which means you are VERY lucky! What appeals to you?
Only child
An only child is a person with no siblings, either biological or adopted. 
Children who have half-siblings or step-siblings, either living at the same house or a different house - especially those who were born considerably later - may have a similar family environment to only children, as may children who have much younger siblings from both of the same parents (generally ten or more years).
Overview.
Throughout history, only children were relatively uncommon. From around the middle of the
was bred to do what I do now", Wambach said in an interview. "Growing up as the youngest of seven was like being in a team environment, you learn all kinds of things ... I learned how to compete, my brothers and sisters always played with me on the same level and they never let me win until I was better than them and deserved it. Being in such a big family makes you humble. You might have a certain skill or talent but there is always someone who is better at