Can't you see me..?

Eric is a normal high school kid. Good grades, quiet, doesn't have many friends. One day he was taking notes in his favorite class, trig. He looked up while taking notes, and realized someone was looking at him.. He doesn't know what to do, so he looks down like nothing happened. He continues to write down his notes. He looks up again. He finds the girl looking at him once again. She smiles at him..
Who could this mysterious person be?
Why would she be looking at him?
Did she like him?
No, nobody likes Eric like that..
But she is pretty..
Eric gets this funny feeling in his stomach, butterflies?
No just the school lunch..
It's a weird different feeling.. Never felt like this before..
What's going on with him..?