Sharing Our Innermost Thoughts

Ever since I was really little, my dad has told me that “boys are a waste of time” and they’ll distract me from school. But then he has the audacity to tell me that “when I get married” or “when I have my own kids” I’ll understand whatever he’s talking about.
I know for certain that he is the roof of my commitment issues and he’s scared me away from ever being in a relationship, or close to people in general.
He’s started telling me about how miserable adults who aren’t in relationships (mainly those who don’t have kids) are. How they’ll never know the true happiness and purpose that comes with raising a child or nurturing a relationship, as if he hasn’t caused me to be exactly like those people.
I am asexual (I don’t experience sexual attraction), so it’s bold of him to assume I’d give him blood-related grandchildren in the first place.
In addition to that, I’ve expressed my disinterest in children of any age. Every time I’m told a sentence that starts with “when you have your own kids…”, I say that the thought of raising a child:
1. Scares me
2. Doesn’t sound worth it to me
But my parents don’t listen. My mom’s told me I’d get over it, but I’ve felt this way since I was 8-or-so. They just can’t comprehend that I don’t like spending time with kids, don’t like the thought of being pregnant, and don’t like them telling me that I WILL and I MUST have kids being that I’m only a teenager.