HOW CAN I TELL HER HOW I FEEL ABOUT HER...?

This may sound werid for a 18year old dude who has no courage to tell a gal how he feel about..i just her pass by my house everday and the only thing we say to each other is hello...i have been waiting for a real chance just to tell her my mind off,but it seems it will not come soon,i love her and i know she loves me too!