If you see her and she smiles and comes over to talk to you, don't walk away. Let her come over and say hi and say sorry for walking away the other day. After that see what she says...if she says look I have been meaning to talk to you about us and so on, let her talk and go from there. Your prolly wondering what to say, but just BE HONEST, girls like honesty, the last thing we want is for someone to lie to us. If she just said she wanted to say hi and leaves then you have two choices, either you stop her and say you wanted to talk her more, or you can let her go. Girls, well I guess most girls some can be different then others, like when you go out of your way to start a conversation, we may say that we just wanted to say hi and leave but we really do want to say more. Listen what I say might be different from what she likes, some girls can be VERY different then others. If that seems to be the way, play it cool.