Why do clingy girls suddenly turn extreme independent?

She was extremely independent when we met. So much so she didn't need anyone.

And WHEN she FELT my need in her life, she fell in love with me. Extremely clingy with no breathing room. It was exhausting. She asked me to help her do things that she was extremely capable of doing herself. But she wouldn't ask anyone else for the same. Also in case of things that she needed my help, I didn't help her and plainly said NO.

We split. Met accidentally, she didn't bother to even look at me or say Hi.

Worst, we see each other everyday now. She wouldn't ask for my help even if she knows I can be the only one who can help her. Her personality shifted fully.

Why do clingy girls suddenly turn extreme independent?
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