i'm pretty sure i have experienced romantic attraction maybe twice. it's hard for me to define. especially since i have a hard distinguishing all types of attraction. romantic attraction for me was a sharp pang of fondness and a desire to spend time with them alone (i guess?) and have a strong partnership based on mutual feelings of attraction towards one another. i think it's definitely emotional before physical. the physical response may (or may not) come afterwards.
personally, i like generally "romantic" actions, but because of my general lack of romantic attraction, i can usually classify these actions as either platonic or sexual (at least for me).
like maybe:
holding hands - platonic
forehead kiss - platonic
passionate kissing - sexual
cuddling - platonic
more passionate cuddling/actions - sexual
idk if this can apply to everyone, but it helps me be okay with liking these sort of things even though i'm aro. i'm positive i'm on the aromantic spectrum so you can't argue that these actions justify romantic attraction. that's just not the case for me.
my situation kinda sucks because i feel like i'm not fit for a relationship because i won't have romantic attraction for my partner, yet desire romantic actions. and i love qprs (i'm in several) but they're strictly platonic. i haven't had any strictly sexual relationships either, which is an option, but i'm not sure that fits either because it involves "romantic" acts that that person may not be comfortable with/cause them to develop feelings for me that i cannot return.
romantic attraction is hard to define and i would generally leave it up to each individual to decide for themselves what it means to them.