Ive fallen for her, I think she've fallen for me

I have this classmate of mine which is very much pretty. I like her and i think she likes me too. The fact she always comes to my side and speak up with me. When I look at her, our eyes are glittering to each other. I feel the romantic atmosphere really. Just to get an advice i registered to this forums and ask an honest answer.

My classmates pair up her to my other classmate. This made me feel bad since i don't want a negative feedback from them about me. I wanted to make her my first girlfriend. Would that be all right? Yeah I know i should confess to her but i really don't know if that would be a good decision. Help me out guys please! Thank you