How can I get my ex back (please I need this)?

I am 16 years old, and my ex girlfriend broke up with me 10 months ago. Even after all that time, I still think about her every day. Over the summer I thought I had finally moved on, but as it turns out I’ve never stopped wanting her back. Nothing in the world could make me happier than getting back together with her. She goes to a different school now, but I occasionally see her at parties and other social gatherings. I can’t accurately portray how much I miss her, and I would do anything to win her back.

buy her chocolates, flowers, expensive clothes and a rat