Fictosexual/romantic literally isn't the same as merely simping/fan-boying/girling/enbying/etc. 😶 That's the annoying part about it, because everybody thinks that is all that it is and "Well, *I* once liked a fictional character because they were cute, so *I* must be fictosexual!" It's when you can really *ONLY* feel things for fictional characters, as well as feel much stronger connections, bonds, and other such things for fictional characters (especially romantic/sexual feelings).
I myself can feel things for real people, but said feeling never last. Instead, I only find myself being genuinely attracted to and feeling true sexual/romantic feelings towards fictional characters (and not just because of looks, but for just about everything). Now, I *did* used to believe I was a mere "simp"/"fanboy", but it wasn't until about a day or three ago that I really started thinking about it, and then ✨p o o f✨. I realized I was never what I thought I was; a mere simp/fan-boy who just struggled with relationships and found comfort in fictional characters. Rather, I realized that, while I lack feelings towards real people for long periods of time, I can form close bonds, genuine feelings, and strong connections towards fictional characters, those of which actually last, unlike with real people, and that's definitely not simping/fan-boying; that's *genuine* attraction and feelings, like how a non-fictosexual/romantic would normally love a real person.
Due to my lack of attraction towards real people, I even used to identify as aro/ace- Still, even at that time, I longed for a relationship, which made me wonder as to why I yet couldn't... feel anything towards real people, but still always felt things for fictional characters? So, yeah- Guess I've been fictosexual/romantic this whole time, with it hiding right under my nose 😅
In short, though I can feel romantic/sexual things for real people, especially quite strongly at first, said feelings always tend to fade with time (which is due to past trauma of mine), meanwhile I *can* feel things for fictional characters - feelings that are actually *genuine*, and the sort of thing that somebody who isn't fictosexual/romantic, as said before, would feel towards a real person. Hence, just kind of imagine how you feel towards a real person that you love. Well, that's how I feel towards fictional characters, meanwhile the same cannot be applied to real people, unlike your own attraction, you know?