You aren't the only one, Alice.
I was the youngest in a family that was very anti-children, so I grew up very quickly. I always hung out with adults, rather than peers (until my mid-teens). As a result, I didn't develop a lot of comfort or experience around children. I felt very uncomfortable when I was around them. I didn't know what to do! I also wasn't used to the sounds, behaviors, etc. It was scary for me.
In my 20's, I clicked with a guy who was great with children of all ages & we stuck together. I put off having children until I was in my early 30's, but it was an absolutely wonderful experience for me. One that I don't regret a bit!

Mommyhood hasn't been an easy task for me, but I've heard that it really isn't for most women in this world. That helps me feel better.
Anyway ~ I can understand where you're coming from, I think.

Best wishes to you! Whether or not you ever choose to have children is your decision. Please don't feel pressured to make such a huge life-changing decision that you're uncomfortable with. We understand.