I really need some help? I'll answer yours?

I met this girl a year ago. There was no contact until the past winter. I was with my group of friends one day and noticed that girl staring at me. I thought nothing of it, until that time turned into months with her still staring. I made attempts to talk to her, but she sounded monotone and was always in a hurry. Her friends always stared at me. I messaged her one day and she told me that she had a be and did not want to talk. I made it very clear that I just wanted to be friends. But she still went on about having a bf and other stupid things. . she seemed kind of arrogant so I left it. I did happen to see her with someone, maybe a "bf" but idk. Now she gives me these looks.. She always used to be around his arm when I happened to see her, but now they never appear together. She's always alone. I wrote something in my notes that I plan on sending her in June , since I'll prob never see her again. It talks about how she acted and how everything went down. Retrospect if you will. Could it change something? Thanks.