I’m not an idiot, is how. You don’t need to feel romantic attraction to know how it works. You don’t need to feel sexual attraction to know how it works. You see someone who’s in a romantic relationship and you can see the signs, you can hear it in the way they talk.
Of course I love my QPP. I’m sure you still say you love your friends, because you do. Platonically. I’m very close with her, in a way that I don’t want to lose her. I don’t want anything to happen to her. Would I care if she married someone else? No, absolutely not, because I’m not romantically in love with her. I’m not her partner, so I don’t get jealous. And I’m not explaining polyamory either, because again, we’re not dating and I wouldn’t be comfortable sharing someone I was in a relationship with, much like has happened to me in the past before I came to the realization that I’m on the aro spectrum.
The best way to actually understand it is to look at a concrete example. Spock, Kirk, and McCoy, of Star Trek. Kirk and McCoy are best friends. Everyone knows that. So are Spock and Kirk. But there’s a reason that Spock and Kirk are the legendary duo, and not Kirk and McCoy. Because their friendship transcends the boundaries of what’s considered normal. They rely on each other, they’re supportive, they’re fearful for eachother’s safety, they bow when either is threatened. They never kissed, they never fucked, they never outed themselves as being in a relationship. But despite that, they’re different. They’re soulmates. And that is what being a QPP to someone is like. That’s not being best friends, that’s being more without stating to the world “This is who I’m fucking and kissing on a regular basis.”
You’re not in a QPP relationship, and that’s fine. I wish you had one. But don’t you dare for a second think that it isn’t a possibility just because you don’t understand it; just because you have a keyboard and an opinion and a cocky attitude. You don’t feel it? That’s fine. But someone else does. And you don’t get to invalidate someone else’s experiences just because you don’t like it.