Hello! I also figured out I'm aromantic around the age of 14 or 15. I called myself ace when I was 10 because I didn't like anyone, though I didn't know about the aro label. It's stuck with me since and I haven't had to change it.
I thought I had a crush around 13-14 and called it that mistakenly but it was some sort of platonic attraction after all. I first looked into microlabels like aegoromantic, greyromantic, biromantic, lithromantic etc. before I realized I'm just aro. I have faked one crush in the past to 'fit' in which I guess is kind of common?
I've only come out to my closest friend, and I didn't really initiate it. She told me she likes guys and asked about me. I said I don't like anyone and told her I'm aroace. I don't plan on coming out to my mom before I'm 18, and that's only about a year away. I'm most likely not telling my dad or my sibling or other family members. Come out when and if you want to, no pressure or rush!