Crush On Someone

im not really a kid(I'm in my late teens) but i genuinely have no idea how to even know if I have a crush on a person.

here's the situation, there's this guy in my class, we've talked a few times, not much but I feel like I might have a thing for him?

is there smth like a checklist for me to know that ooh i like this person?

Ahh so i have this idk wierd maybe kind of crush on a guy(ps: he is on my mind 24/7). he is 3 years older than me and he is very attractive he has got those greek god looks, venom voice, mythical body and he is good at sports and studying. He has lots of girls fawning over him every now and then and i met him through an online platform we both added each other on insta and snap and we did videocall also [ THE FIRST GIRL WITH WHOM HE HAS EVER DONE A VIDEOCALL]. But the problem is that he thinks of me as his little sister; he is protective of me if anyone flirts wih me he gets annoyed but he only looks at me like his little sister and I LOVE HIM. What do I do?? T-T （/TДT)/ （/TДT)/ （/TДT)/

I haven't had a crush in more than a decade and all of a sudden, I get one? She's super cool and we've been hanging around a lot lately but also lowkey hanging out with her makes me so nervous idk what to do.

So i have had a crush on a guy since last year of school. Guy is so talented at art and quite literally the most popular guy in my grade and I KNOW I GOT NO CHANCE OK GUYS . i aint popular or really pretty. But ive liked him for a year and i want to get over him and i feel like shit...

so tips to either get over him or get with him are welcome