So there is this girl i like?

I am infatuated with this girl all the physical properties that i adore.well anyway what should i do .when i see her in the hall i look into her beautiful eyes and she looks back into mine for a few seconds neither of us ever have a facial expression since im shy and she seems to be as well i only have one cl with her but we are always in seperate groups so im nvr close to her. im so confused at whats going on with the topic