@fallingapart Just to offer a perspective. I'm an only child.
Pros: I've always felt loved. I was very close with my mom through my childhood. I was good in getting along with adults.
Cons people will tell you about: being lonely. Thisbhonestly didn't apply to me, because I've had a well maintained group of close friends.
Cons most people will not talk about: Responsibility
Parents clung onto me. This is the experience I share with all my friends who are the only child. My parents unintentionally were super protective. I'd hear "your all we got" a lot, not in a good way.
When my parents got a divorce my mom started panicking that I'd be alone if she died and spent the next years pushing me into friendships I wasn't comfortable in. She'd also cling to me for dear life.
I never went to study abroad, never did anything risky in my life, because I was raised in this not being OK, because I'm the only child.
Now that my parents are getting old I envy the people with siblings to share helping/caring for their parents. Mine are my Responsibility alone. It's a lot. It's a burden that can wake you up in the middle of the night already as a teenager. Again, this is something I know most of my friends who do not have siblings share with me. All of us decided to have more than one child because we don't want to even unintentionally put this pressure onto one kid.
This is of course just a perspective, but maybe something to keep in mind for how you raise your daughter
.
I'm just pregnant with my second and keep swinging between "I can't wait to have two!!" And "my life with my husband and daughter is perfect this way, what have we done!??"
I'll see when we get to the next phase, I guess