Oh my it seems love is in air

During a normal Monday lunch break, girl saw a boy, he looks interesting, she thinked about talking to him, but she has social anxiety., she is pretty scared of talking to people, the boy continues walking on the hallway. She keeps thinking about every possiblity what would happen if she spoke to him and she can only think about pessimistic results. The boy walks off to the right and she loses the sight of him, now she is thinking about following him, but what if he notices her and hates her after those toughts kept fighting in her head, the lunch break was almost over, she looks at the clock on the wall its almost 1 pm the classes start in 30 minutes, so she decides to return to her classroom because theres nothing else to do she has no friends she cant stop thinking about pessimistic results when talking to anyone, after drawing stuff on her notebook for 10 minutes the boy enters the classroom, She stopped drawing. She thinked 

how did I not notice him before, if he was in my classroom, were alone in the classroom, should I talk to him, there is no one to hear me talk to him, 

she kept thinking, then the boy approached her, she jumped because she was a little bit jumpy, 

He asked in a monotone voice, "Hi, do you have an extra paper?"

 her only interaction with people was with her teachers.

She fumbled and tried to speak: "U-m h-h-hi, yes, I h-h-have an extra p-paper," she tore a piece of paper out of her notebook and gave it to him.

He said "thanks" and go to his desk

Girl blushed and thinked someone actually talked to me, im such an idiot why did i answer it like that she was frustrated with herself