I wasn't. I grew up with an older sister, but she had a lot of problems, and she wanted out. She's on drugs somewhere, and I don't even know if she's still alive. Now, I'd consider myself an only child. We rarely ever played together when I was younger... and when she moved in with me in 2016, she stole my 3DS and all of my games (including ACNL!!) and pawned them off for money for drugs. I don't know... I may never forgive her and as far as I know... yeah. I'm an only child.
I hope you're doing okay despite all this.