A smile means something to me. Especially if it's from her.

You could say that I, with 4 group-mates of mine, presented to the class.

Before class started and while I was standing on the elevated platform a friend shouted something.
I smiled back at her and to the class. As I smiled at the class I saw Math smile at me.

Gosh.

Note: I use a pseudonym to hide my identity. I refer to a certain person I like as Math because I have a passion for math and it seems it seems to be the same for her.

EDIT: I removed incriminating details because to the right person it will disclose my identity