duhhhh...of course those are signs. I hope you have the balls to walk up and talk to her. Girls like a man that take intiative...when she`s at her locker(im guessing this is high school stuff)..just walk up to her and make small talk...dont try any cheesy lines either...just be smooth...say Hi, whats going on blah blah..u going to the game Friday?? And look her in the eyes and talk with confidence...very simple things like this can get you any girl...