i might have a crush but idk how romance works

GAH as title says i am so fucked. so there's this really pretty and hella cool and funny girl at school and she like goes out of her way to talk to me and idk I might have a crush on her?? even tho I was almost sure I was only into guys?? but i cant tell if i just admire her and wanna spend time w her and get her approval cause shes fuckin cool as shit and shes lowkey my idol lmao or if i have a crush on her. gahhhhhh. I dont know how I feel about romantic stuff with her or anyone in general, it kinda stranges me out and I've never really been in an irl relationship so its like uncharted territory (and I might be arospec??). And idk I could also see myself maybe wanting a sexual relationship w her but thats ALSO kinda uncharted territory for me lmao and idk how I feel about doin the do w someone in reality. but like i used to do certain things (that im not gonna elaborate on cause tmi) with this one girl a couple yrs ago and I randomly thought of doing so w this new girl and it definitely wasnt an unpleasant idea? blegh everything is so confusing idk what do yall think lol.