Pay attention to how she feels.
When a girl does something, don’t think she’s doing it for no reason. If she’s hurting or if she’s crying, then don’t just brush it off as if it’s nothing to you because I promise you that there is reason to why she is acting the way she is, maybe she wants you to be there for her or maybe she’s going through some things. Take the time to listen to her, find out and understand what is making her sad or what is making her mad, you know? Then work to resolve the issue, don’t walk away from her because when you do, it makes her feel like she’s not even worth your time and you may not see it, but it hurts her when you treat her problems like they are nothing to you. She needs you to be there for her, not anyone else, so do just that and be the one that is there to comfort her. take the time to listen and understand, that’s all she’s really asking for.