Is this the overwhelming friendship that you talk about on your other post?
It’s not unusual to not have had romantic feelings for someone by age 14, and if she is aro/ace, she’ll figure that out about herself without necessarily knowing official terminology. If she gets curious, I presume she can access the internet. If she talks to you about it again, you could casually say “hey, I’ve heard some people don’t ever feel those feelings, it’s called being aromatic/asexual, maybe google it and see if the descriptions speak to you.” Don’t make a slideshow.
What’s with this: “most of my friend don’t like queers being ‘so extravagant when it comes to self-expression’”? Gross. Think about stepping back from these friendships and making friends with people who aren’t homophobes.