A girl is ghosted me. How can I make her regret?

I want her to be regretful and start to love me. We are in the same class.(universty). First everything was good but then she ghosted me and didn't come the meeting. One day she was talking normal. Then again she blocked me on whats app.

I didn't ask her this to her because i know this can go even worser situations. I act as i dont care. Now i have a picture with a girl. If i make this picture as profile picture on whats app and she will see this. Do you think this will make her jeaolus and make me more cool?

A girl is ghosted me. How can I make her regret?
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