First time I kinda came out was when I was 17 but didn't know the term yet or that something like aromanticism even exists.
A friend told me that it was weird that I haven't had a boyfriend yet although I was "already" 17. (I'm afab) And she added "You haven't even kissed a boy yet!!!"
Me: "Why should I wanted to do that? It seems disgusting"
She:" So do you like girls then? I'd be fine with it as long as you don't crush on me" (sick)
Me: "No. I'm just not interested in romantic relationships with anyone."
She: "Naaah. You are just shy" -.-
Yeah...
Off topic: What bothers me a lot is, when people tell you how they see you "crush" on someone and won't change their opinion no matter how often you tell them "I just wanna be friends with them!" -.-
Just a few years ago I learned the term aromantic, and I then came out to my friends on FB with a poem Some of them didn't understand it really, and I got the "You will find someone one day!" "One day you meet someone and fall in love"-bullshit. I then explained again to my friend that this won't happen and I'm not into romantic relationships at all (I'm also romance repulsed) and then she got it.
Funny side note: After my coming outs, a talked with a friend I just had met, and mentioned the troubles you have when you try to explain asexuality and aromanticism to people, and she said "What do you think I had to hear from friends and family that I'm over 30 and never had a boyfriend?" I was like "Wait, what? You're aro ace too???" (She seems to not know the terms but explained it, so that's when I told her that there are terms for it.)
Gender coming out to a friend. I mentioned that I was afraid because of that some "friends" have stopped talking to me since I came out. He: "You worry to much about things. Everything is fine!" Gave me a brotherly hug and that was it. Later the night he wanted to introduce me to a friend of him and just called me his "buddy from Germany". I was like "Yo, now he's forgotten my name!" He clearly didn't want to misgender me.
Another friend told me in messenger after coming out: "Now I can say it. When we met first it was odd to see you in a dress. That just wasn't right. And I never could get used to your name. It hasn't suit you. You'll always be L. and a boy in my eyes!" <3