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? 
all throughout history only children are actually not common i have one brother
Is your brother older or younger? I have two younger sisters, so I rarely had to share stuff or worry about competing with them. But I did take care for them!
i have younger brother, how old are your siblings? i can't imagine living in china where the one child policy was implemented