What to do when a girl cries? Well, this is the answer :
1. You put your arms around her and let her have a good cry. Once she is calms down you can ask her what the trouble is or if you already know then try to make her laugh. That's about it! It's nice of you to be that concerned though. Good for you!
But if that only makes things worst (if you bring up why she`s crying), then just don`t talk about it and try to cheer her up.
2.Give her a quote like this one "A real friend is one who walks in when the rest of the world walks out." Let her know your there.