Childhood crush

My name is sara. This story is about how my life changes.

I am in grade 3. I am an introvert and I don't have friends. There is a boy in my class who is in the same class as me for 4 years but I don't know why I suddenly feel strange whenever I see him.

Class teacher: everyone stand up and give your greetings. Take out your classwork copies and write down this things.

Sara: teacher I have finished writing.

Teacher: okay. Sara, collect the copies of the students who finished writing.

Sara: okay, sir.

Mahbub: Sara, I have finished writing.

Sara: *put's his copy after her own* hehe I am lucky he finished his writing after me so I got the chance to keep our copies together.