Like, if you know someone by name and on social media, have spoken to them a couple of times and just laugh at their jokes they make in class and stuff. It doesn't need to be falling in love perse, just a feeling of 'i'm really liking this person and want to get to know them better but can't' and you just think about them a lot, thinking about what a friendship would be like, or a relationship, how to become closer.
No and be carefree thats one easy way to screw yourself pretty bad. Ya know you plan and think and think but it works in your head! What about what he want? Will he like you? Love that takes two and it requires action. Don't get stuck in without begin realstic.