Help Me.A serious boy problem?

I am crying over this what should I do.Ok,Well there is this girl called shannon and There is this boy called devin.I Like devin alot.Until yesterday when i saw Devin Waiting for shannon at the footpath at the school.He was telling her to go in front of her for when they were walking home together.I am In a BIG state right now.They Are going out!...Please help me Please!!!=[