I recommend looking at different (a)romantic orientations, reading their descriptions, and seeing if anything fits your experience. I'd say you don't have to "meet all the criteria for a diagnosis" or something; if you vibe with the label, see it fits you, makes you feel at home, then stick with it. A label is not a permanent thing, things can change, you could for example think some more and arrive at a different conclusion, but that doesn't make your label any less valid. There's nothing wrong with a little experimenting.
I can say I have similar experiences as you, and I currently identify as aromantic, but I'm still kinda questioning whether they were crushes or as you said seeking validation (or I just can't differentiate between romantic and platonic because I'm autistic). But aromantic is where I feel at home the most, so unless I make a sudden discovery about myself I don't think I'll change it anytime soon.