Don't talk to her. "I can't bring myself to talk to her", JFL, good. It's time to smash that bluepill you have left in you to bits. Maybe you could do that by directly approaching and getting a straight rejection, but it was bluepilled lingering thoughts that brought you to that in the first place.
and a "cute" girl, huh? Every other guy she interacts with probably also thinks she's cute. Not sure why she would care about someone who posts on incels.co with delusional thoughts like "I just can't bring myself to talk to her!!!!

".
Cringe. You should get into the habit of imagining all the slutty things a "cute" girl you see in class has done. Anytime you see a girl just imagine her swiping through tinder or talking with her friends about how great sex was with this one Chad (and her friends agree, because they've fucked the same guy too). Imagine how much power she has. The orbiters she has. The amount of men she's rejected. You're nothing compared to her sexual power. Use this to learn to hate the image of "cute" women. Learn to associate the image of "cute" girls with toxic femininity: unchecked sexual power, disdain for the unattractive, hedonism, vanity, ect.