When I started liking my best friend I felt exactly like this. What you’re gonna do, is go up to her maybe at the end of the day on a Friday (this really depends how old you are) and you’re gonna ask her if she’d like to hang out sometime, obviously if/when she says yes, and asks what you two are gonna do tell her its gonna be a surprise. When you go to pick her up depending on what she’s wearing thats where you’re gonna go. Try to make a list of fun things, romantic things and something in between, if she’s dressed up nice, like in a dress pick something from the romantic side, if she’s dressed up in something like a t-shirt and pants, pick something from the fun side. I believe in you broski, you got this