You need advice eh? Well, what you do is you go up to them when you know they can hear you and say
"I like you" and that's it. If you need an emotional boost to do that, tell someone you will before confessing. That will give you more reason to do it
(im still KC) I'm gonna end up being like "Can i talk to you?" and then being like, "N-never mind ill tell you later" and then shes gonna be like "the hell?"